1. The utility model provides an automatic change coating line equipment, includes loading attachment (1), coating device (2), observation platform (3), curing oven (4), material collecting device (5), conveyer (6) and joint platform (7), its characterized in that: the rear end fixedly connected with conveyer (6) of loading attachment (1), the internally mounted of conveyer (6) has joint platform (7), the front end fixedly connected with coating device (2) of conveyer (6), well front end fixedly connected with observation platform (3) of conveyer (6), well back end fixedly connected with curing oven (4) of loading attachment (1), the rear end fixedly connected with material collecting device (5) of conveyer (6).

2. An automated coating line apparatus according to claim 1, wherein: the feeding device (1) comprises a supporting frame (8), a case (9), a moving frame (10), a positioning plate (11), a connecting block (12), a material (13), a first positioning column (14), a first spring (15), a moving groove (17), a positioning strip (18), a first positioning groove (19), a clamping column (20), a first threaded column (21), a double gear (22), a second threaded column (23), a positioning disc (24), a first gear (25), a first driving belt (26), a motor (27), a moving plate (28), a moving block (29), a second gear (30), a second positioning column (31), a clamping ring (32), a second driving belt (33), a second positioning groove (34), a positioning hole (35) and a clamping groove (36), wherein the supporting frame (8) is arranged at the bottom of the feeding device (1), the case (9) is fixedly connected to the lower end of the supporting frame (8), the motor (27) is installed in the case (9), the double gears (22) are fixedly connected to the lower end face of the motor (27), the first transmission belt (26) is meshed with the lower end of the double gears (22), the first gears (25) are symmetrically meshed with the two ends of the first transmission belt (26), the second threaded columns (23) are fixedly connected to the middle of the first gears (25), the connecting blocks (12) are screwed to the upper ends of the second threaded columns (23), the movable frame (10) is fixedly connected to the inner end faces of the connecting blocks (12), the positioning strips (18) are symmetrically and equidistantly and fixedly connected to the inner end face of the movable frame (10), the materials (13) are slidably clamped in the positioning strips (18), the first positioning grooves (19) are formed in the lower end face of the movable frame (10), and the second transmission belt (33) is meshed with the upper end face of the double gears (22), the second gear (30) is symmetrically meshed with and connected to two ends of a second transmission belt (33), the second positioning columns (31) are fixedly connected to the middle of the second gear (30), the clamping rings (32) are fixedly connected to the lower end faces of the second positioning columns (31), the first threaded columns (21) are in threaded connection with the middle of the second positioning columns (31), the clamping columns (20) are fixedly connected to the upper end faces of the first threaded columns (21), the moving plate (28) is in sliding connection with the surfaces of the clamping columns (20) uniformly and equidistantly, the moving blocks (29) are fixedly connected to the upper end faces of the moving plate (28), the second positioning grooves (34) are arranged in the middle of the moving plate (28), the clamping grooves (36) are symmetrically arranged at two ends of the moving plate (28), the positioning holes (35) are symmetrically arranged on the side end faces of the moving plate (28), locating plate (11) symmetry fixed connection is at the interior terminal surface of braced frame (8), the even equidistance of shifting chute (17) is seted up at the interior terminal surface of locating plate (11), the equal fixed connection in the inside of shifting chute (17) of first locating column (14), the equal fixed connection of first spring (15) is at the interior rear end face of shifting chute (17), the equal fixed connection of positioning disk (24) is at the up end of second threaded column (23).

3. An automated coating line apparatus according to claim 2, wherein: the bottom end face of the supporting frame (8) is provided with a positioning hole matched with the second threaded column (23) and the second positioning column (31), the bottom of the second threaded column (23) is fixedly connected with a clamping ring (32) identical to the second positioning column (31), and the upper end of the supporting frame (8) is provided with a sliding groove matched with the second threaded column (23).

4. An automated coating line apparatus according to claim 3, wherein: the movable plate (28) is slidably clamped in the movable groove (17), the movable plate (28) is slidably connected to the surface of the first positioning column (14) through a positioning hole (35), the other end of the first spring (15) is fixedly connected with the positioning strip (18), and the clamping column (20) is slidably connected in the clamping groove (36).

5. An automated coating line apparatus according to claim 4, wherein: the movable frame (10) is clamped in the supporting frame (8) in a sliding mode, and the movable block (29) is located in the first positioning groove (19).

6. An automated coating line apparatus according to claim 5, wherein: the first gear (25) and the second gear (30) are positioned at two ends of the double gear (22), and the first gear (25) and the second gear (30) are rotationally connected through a first transmission belt (26) and a second transmission belt (33).

7. An automated coating line apparatus according to claim 6, wherein: the connecting block (12) is provided with a threaded hole matched with the second threaded column (23), the movable frame (10) is connected to the surface of the second threaded column (23) in a sliding mode through the connecting block (12), and the second positioning column (31) is provided with a threaded hole matched with the first threaded column (21).

8. An automated coating line apparatus according to claim 7, wherein: the movable plate moving plates (28) are mutually overlapped, the positions of each layer of moving blocks (29) of the movable plates (28) are sequentially arranged, the size of second positioning grooves (34) formed in the surfaces of the movable plates (28) is consistent with the number of the moving blocks (29), the materials (13) are clamped in the clamping table (7) in a sliding mode, and the height of the moving blocks (29) is the same as that of the materials (13) at the lowest layer.

9. An automated coating line apparatus according to claim 8, wherein: the positioning strip (18) further comprises a clamping plate (37) and a second spring (38), the clamping plate (37) is uniformly and symmetrically and fixedly connected to the inner end face of the positioning strip (18) in an equidistant mode, the second spring (38) is fixedly connected to the inner end face of the clamping plate (37), and the second spring (38) can slide and displace in the positioning strip (18) through the clamping plate (37).

Background

Coating and painting are important links in a surface manufacturing process, the defects of rust prevention, corrosion prevention, attractiveness and change of the use of materials are that the coating quality is one of important aspects of the overall quality of products, the appearance quality of the products not only reflects the protection and decoration performance of the products, but also is an important factor forming the value of the products, coating and painting equipment is a vital part in the whole coating process, and main coating equipment is divided into surface pretreatment equipment before coating, painting equipment, coating film drying and curing equipment, mechanical conveying equipment, dust-free constant-temperature constant-humidity air supply equipment and other accessory equipment.

However, the existing coating line equipment has some defects in the using process, such as:

the existing coating line equipment cannot store a large amount of materials, so that the materials cannot be continuously fed, the materials cannot be prepared for next feeding, a large amount of time is wasted due to multiple times of feeding, and the progress of work is seriously affected, so that the coating line equipment is needed to solve the problems.

Disclosure of Invention

The invention aims to provide an automatic coating line device to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: an automatic coating and coating line device comprises a feeding device, a coating device, an observation platform, a curing furnace, a material receiving device, a conveying device and a clamping platform, wherein the rear end of the feeding device is fixedly connected with the conveying device;

preferably, the feeding device comprises a supporting frame, a case, a movable frame, a positioning plate, a connecting block, a material, a first positioning column, a first spring, a movable groove, a positioning strip, a first positioning groove, a clamping column, a first threaded column, a double gear, a second threaded column, a positioning disc, a first gear, a first transmission belt, a motor, a movable plate, a movable block, a second gear, a second positioning column, a clamping ring, a second transmission belt, a second positioning groove, a positioning hole and a clamping groove, wherein the supporting frame is arranged at the bottom of the feeding device, the case is fixedly connected to the lower end of the supporting frame, the motor is arranged inside the case, the double gear is fixedly connected to the lower end face of the motor, the first transmission belt is connected to the lower end of the double gear in a meshing manner, the first gear is symmetrically connected to both ends of the first transmission belt in a meshing manner, the second threaded column is fixedly connected to the middle part of the first gear, the connecting blocks are all in threaded connection with the upper end of a second threaded column, the moving frame is fixedly connected with the inner end face of the connecting blocks, the positioning strips are uniformly and equidistantly and symmetrically fixedly connected with the inner end face of the moving frame, the materials are all in sliding clamping connection in the positioning strips, the first positioning groove is formed in the lower end face of the moving frame, the second transmission belt is in meshing connection with the upper end of the double gears, the second gears are in symmetrical meshing connection with the two ends of the second transmission belt, the second positioning columns are all in fixed connection with the middle of the second gear, the clamping rings are all in fixed connection with the lower end face of the second positioning column, the first threaded columns are all in threaded connection with the middle of the second positioning columns, the clamping columns are all in fixed connection with the upper end face of the first threaded columns, the moving plates are uniformly and equidistantly in sliding connection with the surfaces of the clamping columns, and the moving blocks are all, the utility model discloses a movable plate, including first constant head tank, second constant head tank, joint groove, locating plate, first spring, locating plate.

Preferably, the bottom end face of the supporting frame is provided with a positioning hole matched with the second threaded column and the second positioning column, the bottom of the second threaded column is fixedly connected with a clamping ring which is the same as the second positioning column, and the upper end of the supporting frame is provided with a sliding groove matched with the second threaded column.

Preferably, the movable plate is slidably clamped inside the movable groove, the movable plate is slidably connected to the surface of the first positioning column through the positioning hole, the other end of the first spring is fixedly connected with the positioning strip, and the clamping column is slidably connected inside the clamping groove.

Preferably, the movable frame is slidably clamped inside the support frame, and the movable block is located inside the first positioning groove.

Preferably, the first gear and the second gear are located at two ends of the double gear, and the first gear and the second gear are rotationally connected through the first transmission belt and the second transmission belt.

Preferably, the connecting block is provided with a threaded hole matched with the second threaded column, the movable frame is slidably connected to the surface of the second threaded column through the connecting block, and the second positioning column is provided with a threaded hole matched with the first threaded column.

Preferably, the moving plate moving plates are mutually overlapped, the positions of each layer of moving blocks of the moving plates are sequentially arranged, the size of the second positioning grooves formed in the surfaces of the moving plates is consistent with the number of the moving blocks, the material is clamped in the clamping table in a sliding mode, and the height of each moving block is the same as that of the lowest layer of material.

Preferably, the location strip still includes joint plate and second spring, the even equidistance symmetry fixed connection of joint plate is at the interior terminal surface of location strip, the equal fixed connection of second spring is at the interior terminal surface of joint plate, the second spring passes through the joint plate and can be at the inside sliding displacement of location strip.

Compared with the prior art, the invention has the following beneficial effects:

the invention can realize the preparation of a plurality of materials for feeding at one time by clamping the materials in the positioning strip, is beneficial to increasing the speed for the subsequent processing work, the double gears can drive the first gear and the second gear to rotate through the second transmission belt and the first transmission belt, when the first gear rotates, the first gear drives the movable frame to displace by mechanical energy, the movable frame displaces to drive the internal material to displace, which is helpful for the subsequent feeding work to be smoothly carried out, when the second gear rotates, the clamping columns are driven to displace, the clamping columns sequentially displace from the inner part of the clamping groove, the movable plate can slide and displace in the movable groove through the stretched first spring when the clamping columns are not positioned in the clamping groove, in the process, the moving block can sequentially push the materials in the moving frame into the clamping table, so that continuous feeding is realized, and the working speed is greatly improved.

Through promoting the inside second spring of location strip to both ends, make the inside of second spring opened, put into between the second spring with the material of different thickness, later the second spring can be fixed with inside material through the joint board of compression, realizes carrying out the material loading with the material of different thickness.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of the main structure of the present invention;

FIG. 2 is an expanded view of the loading device of the present invention;

FIG. 3 is a schematic view of a half-section structure of a positioning plate in the feeding device of the present invention;

FIG. 4 is a schematic view of the internal structure of the loading device of the present invention;

FIG. 5 is a schematic structural view of a movable frame in the loading device according to the present invention;

FIG. 6 is a schematic structural view of a movable plate of the feeding device according to the present invention;

FIG. 7 is a schematic view of a disassembled structure of a moving plate in the feeding device of the present invention;

fig. 8 is a schematic structural view of a feeding device according to a second embodiment of the present invention.

In the figure: 1-feeding device, 2-coating device, 3-observation platform, 4-curing oven, 5-receiving device, 6-conveying device, 7-clamping platform, 8-supporting frame, 9-cabinet, 10-moving frame, 11-positioning plate, 12-connecting block, 13-material, 14-first positioning column, 15-first spring, 17-moving groove, 18-positioning strip, 19-first positioning groove, 20-clamping column, 21-first threaded column, 22-double gear, 23-second threaded column, 24-positioning disk, 25-first gear, 26-first transmission belt, 27-motor, 28-moving plate, 29-moving block, 30-second gear, 31-second positioning column, 32-clamping ring, 33-second transmission belt, 34-second positioning groove, 35-positioning hole, 36-clamping groove, 37-clamping plate and 38-second spring.

Detailed Description

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The invention is further described below with reference to the accompanying drawings.

Example 1

Referring to fig. 1, an embodiment of the present invention: an automatic coating and coating line device comprises a feeding device 1, a coating device 2, an observation platform 3, a curing oven 4, a material receiving device 5, a conveying device 6 and a clamping platform 7, wherein the rear end of the feeding device 1 is fixedly connected with the conveying device 6, the clamping platform 7 is installed inside the conveying device 6, the front end of the conveying device 6 is fixedly connected with the coating device 2, the middle front end of the conveying device 6 is fixedly connected with the observation platform 3, the middle rear section of the feeding device 1 is fixedly connected with the curing oven 4, and the rear end of the conveying device 6 is fixedly connected with the material receiving device 5;

referring to fig. 2, 3, 4, 5, 6, and 7, the feeding device 1 includes a supporting frame 8, a case 9, a moving frame 10, a positioning plate 11, a connecting block 12, a material 13, a first positioning post 14, a first spring 15, a moving groove 17, a positioning bar 18, a first positioning groove 19, a clamping post 20, a first threaded post 21, a double gear 22, a second threaded post 23, a positioning plate 24, a first gear 25, a first transmission belt 26, a motor 27, a moving plate 28, a moving block 29, a second gear 30, a second positioning post 31, a clamping ring 32, a second transmission belt 33, a second positioning groove 34, a positioning hole 35, and a clamping groove 36, the supporting frame 8 is disposed at the bottom of the feeding device 1, the case 9 is fixedly connected to the lower end of the supporting frame 8, the motor 27 is disposed inside the case 9, the double gear 22 is fixedly connected to the lower end face of the motor 27, the first transmission belt 26 is engaged with the lower end of the double gear 22, the first gear 25 is symmetrically engaged and connected with two ends of the first transmission belt 26, the second threaded columns 23 are fixedly connected with the middle part of the first gear 25, the connecting blocks 12 are all screwed and connected with the upper ends of the second threaded columns 23, the moving frame 10 is fixedly connected with the inner end faces of the connecting blocks 12, the positioning strips 18 are uniformly, equidistantly, symmetrically and fixedly connected with the inner end faces of the moving frame 10, the materials 13 are all slidably clamped and connected in the positioning strips 18, the first positioning groove 19 is arranged on the lower end face of the moving frame 10, the second transmission belt 33 is engaged and connected with the upper ends of the double gears 22, the second gear 30 is symmetrically engaged and connected with two ends of the second transmission belt 33, the second positioning columns 31 are all fixedly connected with the middle part of the second gear 30, the clamping rings 32 are all fixedly connected with the lower end faces of the second positioning columns 31, the first threaded columns 21 are all screwed and connected with the middle parts of the second positioning columns 31, the clamping columns 20 are all fixedly connected with the upper end faces of the first threaded columns 21, the movable plate 28 is connected to the surface of the clamping columns 20 in a sliding mode at uniform and equal intervals, the movable blocks 29 are fixedly connected to the upper end face of the movable plate 28, the second positioning grooves 34 are formed in the middle of the movable plate 28, the clamping grooves 36 are formed in two ends of the movable plate 28 symmetrically, the positioning holes 35 are formed in the side end face of the movable plate 28 symmetrically, the positioning plates 11 are fixedly connected to the inner top end face of the supporting frame 8 symmetrically, the movable grooves 17 are formed in the inner end face of the positioning plate 11 at uniform and equal intervals, the first positioning columns 14 are fixedly connected to the inner portion of the movable groove 17, the first springs 15 are fixedly connected to the inner rear end face of the movable groove 17, and the positioning disc 24 is fixedly connected to the upper end face of the second threaded column 23.

The bottom end face of the supporting frame 8 is provided with a positioning hole matched with the second threaded column 23 and the second positioning column 31, the bottom of the second threaded column 23 is fixedly connected with a clamping ring 32 which is the same as the second positioning column 31, the upper end of the supporting frame 8 is provided with a sliding groove matched with the second threaded column 23, the second threaded column 23 and the second positioning column 31 can be positioned, and the second threaded column 23 can rotate inside the supporting frame 8.

The moving plate 28 is slidably clamped in the moving groove 17, the moving plate 28 is slidably connected to the surface of the first positioning column 14 through the positioning hole 35, the other end of the first spring 15 is fixedly connected with the positioning strip 18, and the clamping column 20 is slidably connected in the clamping groove 36, so that the moving plate 28 can slide and displace in the moving groove 17 by stretching the first spring 15.

The movable frame 10 is slidably clamped in the supporting frame 8, the movable block 29 is positioned in the first positioning groove 19, and the movable block 29 can push the material 13 in the movable frame 10 to move.

The first gear 25 and the second gear 30 are located at two ends of the dual gear 22, and the first gear 25 and the second gear 30 are rotationally connected through the first transmission belt 26 and the second transmission belt 33, so that the dual gear 22 can drive the second gear 30 and the first gear 25 to rotate at the same time.

Connecting block 12 offers the screw hole with second screw thread post 23 looks adaptation, and moving frame 10 passes through connecting block 12 sliding connection on the surface of second screw thread post 23, and the screw hole with first screw thread post 21 looks adaptation is offered to second reference column 31, realizes that 23 can drive 12 and carry out the displacement and 31 can take 21 to carry out the displacement.

The moving plate moving plates 28 are mutually overlapped, the positions of each layer of moving blocks 29 of the moving plates 28 are sequentially arranged, the size of second positioning grooves 34 formed in the surfaces of the moving plates 28 is consistent with the number of the moving blocks 29, the materials 13 are slidably clamped in the clamping table 7, the height of each moving block 29 is the same as that of the lowest layer of materials 13, and the overlapped moving plates 28 can be slid once.

When the embodiment is implemented, the internal mechanisms of the feeding device 1 are matched with each other, so that the materials 13 stored inside can be continuously fed, a large number of feeding devices 13 can be conveyed at one time, the required time for feeding is greatly shortened, the subsequent processing can be continuously carried out, and the processing speed of the materials 13 can be increased.

Example 2

On the basis of embodiment 1, as shown in fig. 8, the positioning bar 18 further includes a clamping plate 37 and a second spring 38, the clamping plate 37 is fixedly connected to the inner end surface of the positioning bar 18 uniformly and symmetrically at equal intervals, the second spring 38 is fixedly connected to the inner end surface of the clamping plate 37, and the second spring 38 can be slidably displaced inside the positioning bar 18 through the clamping plate 37.

In the implementation of the embodiment, the second spring 38 is pulled towards both ends, so that the second spring 38 slides towards both ends of the positioning bar 18 to move, the second spring 38 is opened, then the material 13 is placed between the second springs 38, the second spring 38 is loosened after the material is placed, the second spring 38 can elastically move through the clamping plate 37, the material 13 inside the second spring 38 is extruded and fixed, and the positioning bar 18 can fix the materials 13 with different thicknesses.

The working principle is as follows: the user now places a plurality of materials 13 between the positioning bars 18, so as to store the materials 13, which helps the subsequent feeding work to be smoothly performed, and then the motor 27 to be installed inside the case 9 is electrically connected, the motor 27 rotates, and then the motor 27 drives the dual gear 22 to rotate, the dual gear 22 drives the second gear 30 and the first gear 25 at two ends thereof to rotate through the first transmission belt 26 and the second transmission belt 33, and when the first gear 25 rotates, the second threaded column 23 is driven to rotate, the second threaded column 23 rotates to be fastened on the bottom end face of the supporting frame 8 through the fastening ring 32, because the second threaded column 23 is in threaded connection with the connecting block 12, the second threaded column 23 rotates to displace the connecting block 12, thereby realizing that the connecting block 12 drives the moving frame 10 to perform sliding displacement, and further realizing that the materials 13 inside the moving frame 10 are driven to perform displacement, meanwhile, the second gear 30 rotates to drive the second positioning column 31 to rotate, the second positioning column 31 is rotatably clamped on the bottom end face of the supporting frame 8 through the clamping ring 32, because the second positioning column 31 is in threaded connection with the first threaded column 21, the first threaded column 21 can be displaced when the second positioning column 31 rotates, so that the first threaded column 21 drives the clamping column 20 to perform sliding displacement, the clamping column 20 can perform sliding displacement in the clamping groove 36, when the moving frame 10 drives the topmost material 13 to displace to the position of the second layer material 13, the clamping column 20 is just displaced to a position which is not in the clamping groove 36 formed in the first layer moving plate 28, so that the moving plate 28 of the first layer is not clamped and fixed by the clamping column 20, and then the first layer 28 can be subjected to elastic displacement by the stretched first spring 15, so that the moving plate 28 performs sliding displacement in the moving groove 17, the moving plate 28 slides and displaces on the surface of the moving groove 17 through the opened positioning hole 35, then the moving plate 28 brings the moving block 29 to slide and displace between the first positioning grooves 19, in the process, the moving block 29 pushes the lowest layer of the material 13 into the clamping table 7 to complete feeding, then the clamping table 7 conveys the material 13 to the inside of the coating device 2 through the conveying device 6, the coating device 2 coats the material 13, the clamping table 7 conveys the coated material 13 to the upper end face of the observation table 3 to observe, after observation, the clamping table 7 conveys the coated material 13 to the inside of the curing oven 4, in the process that the coated material 13 moves in the curing oven 4, the curing oven 4 dries the coated material 13, and after drying, the clamping table 7 conveys the material 13 to the inside of the material receiving device 5 to perform blanking, after the processing of the material 13 is completed, after the first feeding, the second threaded column 23 will continue to drive the moving frame 10 to move downwards, and move to the position where the material 13 on the upper layer is located on the material 13 on the next layer, and at the same time, the first threaded column 21 will drive the clamping column 20 to move, and the clamping column 20 will sequentially move out of the clamping groove 36 formed in the moving plate 28 on the next layer, so that the moving plate 28 will sequentially slide and move inside the moving groove 17, so that the moving block 29 will sequentially push the material 13 inside the moving frame 10 into the clamping table 7, thereby realizing the continuous feeding operation, and after all the materials 13 stored inside the moving frame 10 are fed, the moving block 29 will be pulled to drive the moving plate 28 to slide and move inside the moving groove 17, and move to the original position, so that all the clamping grooves 36 are mutually overlapped, and then the double gears 22 are reversely rotated, thereby realize that second screw post 23 drives moving frame 10 and gets back to the home position, meanwhile first screw post 21 can drive joint post 20 and get back to the home position and fix the movable plate 28 joint again, later put into moving frame 10's inside with new material 13, thereby realize continuing to carry out the material loading work, through to both ends pulling second spring 38, thereby second spring 38 is to the both ends sliding displacement of locating strip 18, make second spring 38 opened, later put into between taking second spring 38 with material 13, loosen second spring 38 after putting into, second spring 38 can be elastic displacement through extruded joint board 37, thereby realize that second spring 38 extrudees the material 13 of inside fixedly, realize that locating strip 18 can fix the material 13 of different thickness.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.