Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS3673984 A
Publication typeGrant
Publication dateJul 4, 1972
Filing dateAug 28, 1970
Priority dateAug 28, 1970
Publication numberUS 3673984 A, US 3673984A, US-A-3673984, US3673984 A, US3673984A
InventorsRaymond Francis Coulombe
Original AssigneeDart Ind Inc
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Dip coating machine
US 3673984 A
Abstract  available in
Images(4)
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

Primary Examiner-Mervin Stein Assistant Examiner-Leo Millstein Attorney-Leigh B. Taylor, Michael L. Dunn, Paul R. Wylie and Harold R. Beck I United States Patent [151 3,673,984 Coulombe 1 July 4, 1972 [54] DIP COATING MACHINE 57 ABSTRACT [72] Inventor: Raymond Francis Coulombe, Milford, A dip coating machine:

Conn. wherein quick release of dip forms is accomplished by means of a rapidly removable pin, [73] Asslgnee' Dan Industries Los Angeles Calif wherein the dip form may be oriented about its rotational [22] Filed: Aug. 28, 1970 axis by means of at least two pinions mounted to a single axle, one end of the axle being mounted to the form, at [21] 67381 least one of the pinions having a toothless peripheral portion and a rack mounted to the frame for each pinion so i 1 --l 3/4 18/423 that movement of the form along the rack causes the [51] lnt.Cl. ..B05c 3/00 pinions to roll in their respective rack thus causing the [58] FIG! of Search ..1 18/425, 416, 54, 238, form to rotate and so that a pinion having a toothless por- 214/17 17 95 tion will stop rotating at a predetermined position when it has rotated so that its toothless portion faces its rack, pro- References vided the other racks have gaps at that point; and

wherein a plurality of forms may be lowered into and UNITED STATES PATENTS removed from a dipping solution by a single mechanism 2,704,993 3/1955 Davis ..118/425 while permitting each form to be individually rotated by 2,731,668 1/1956 Miner ..118/425 means of a separate axle for each form passing through a 3,382,844 5/1968 Kumpf ..l18/425 movable block, each axle being provided with an in- 3,256,567 6/1966 Bjorck ..1 18/425 dividual rotating device.

6 Claims, 6 Drawing Figures mr COATING MACHINE BACKGROUND OF THE INVENTION 1. Field of Invention This invention concerns an apparatus for forming plastic articles and relates more particularly to a dip coating apparatus having forms which can be axially oriented automatically and which can be easily and readily replaced or removed.

2. Description of the Prior Art In the prior art, dip coating mechanisms have been designed and sold. These mechanisms had serious disadvantages. When the forms had to be removed from the mechanism, bolts or screws had to be removed and the operation of the mechanisms had to stop. The forms were therefore removable only with the expenditure of a substantial amount of time and effort. Furthermore, a form on prior art mechanisms could not be oriented about its rotational axis. Such orientation is frequently necessary to permit excess coating material to collect on a particular portion of the form, to permit-stamping or printing at a'particular position on the form, to pennit removal of an article from the form by a uniform method and to permit the forms to have maximum clearance between themselves when they are moving around a curve in the conveyor line. One prior art attempt was made to orient forms about the rotational axis by using flat sided rollers which were designed to roll on a track until the flat side of the roller faced the track when rotation was supposed to stop. In practice the roller slipped along the track and proper orientation was not consistently obtained. In addition, both the rollers and the track wore rapidly which made it necessary to shut down the mechanism to replace the track and rollers.

.In prior art mechanisms, a complete set of individually acting machinery was needed for each of the forms in order to raise and lower the forms. The mechanisms which were designed to coat a plurality of forms using a single mechanisms for raising and lowering the forms did not permit each of the forms to independently rotate or be independently oriented about its rotational axis.

BRIEF DESCRIPTION OF THE INVENTION An improved machine for forming dip coated film articles on a form. The machine includes the following parts:

a frame;

a carriage;

a form;

means for rotationally mounting the form upon the carriage;

a tank for holding a dipping solution; means attached to the frame and the carriage for lowering the carriage and form to immerse the form in the dipping solution; and

means attached to the frame and carriage for removing the form from the dipping solution by raising the carriage.

The machine is improved over prior art machines in that the form may be easily and rapidly attached and removed without stopping the machine. The structure which permits the easy attachment and removal comprises a rod interconnected with the form. The rod fits into an opening in the carriage and is held in the carriage by an easily removable pin passing through a hole in the carriage into a hole in the rod.

The machine is further improved in that the form may be oriented about its rotational axis. The axial orientation is accomplished by means of at least two pinions mounted to a single axle. One end of the axle is in turn mounted to the form. At least one of the pinions has a toothless peripheral portion, the toothless portion on the pinion being proximate teeth on the other of the pinions. One of the pinions engages a first rack mounted to the frame and the other of the pinions engages a second rack mounted to the frame so that movement of the form along the rack causes the pinions to roll in their respective racks thus causing the form to rotate. A gap in one of the racks will permit the pinion engaged in the other rack to stop rotating when the other pinion has rotated so that its toothless portion faces its rack. The above apparatus gives positive orientation to the form and minimal wear to the orienting structure.

The machine is also improved in that a plurality of forms may be lowered into the dipping solution and removed from the clipping solution by a single raising and lowering mechanism while permitting each of the forms to be independently rotated or oriented about its rotational axis. The above result is accomplished by a combination of a rod extending from the carriage, a block attached to the rod and a plurality of axles for holding the forms. Each of the axles is rotationally mounted through one of a plurality of holes in the block. One end of each of the axles is provided with a plurality of rotating devices such pinions for operation in a plurality of tracks which may be pinion racks, to permit individual rotation and orientation of the forms as previously discussed.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side elevational plan view of the improved dip coating machine;

FIG. 2 is a front perspective view;

FIG. 3 is a top schematic view of the entire dip coating machine;

FIG. 4'is a rear perspective view of the rotating device of the machine which permitsorientation of the dip coating forms;

FIG. 5 is a front elevational plan view of the machine; and

FIG. 6 is a side plan view of the combination of rod, block, axles, pinions and forms which permit individual rotation of the forms.

PREFERRED EMBODIMENT In the preferred embodiment of this invention as seen in FIG. 1, 4 and 6 each of two forms 10 and 11 are attached to one end of axle 54. Each axle is rotationally mounted through a bore 38 in block 20. Pinions 12 and 13; and 67 and 68 are attached proximate the other end 49 of each axle 54 so that rotation of any of the pinions rotates one of the axles 54 which in turn rotates form 10 or 11. Pinions 12 and 13 operate in pinion racks 33 and 34 and Pinions 67 and 68 operate in racks 31 and 32. Racks 31 and 32 are attached to frame segment 62 which is in turn attached to frame 39. Racks 33 and 34 are attached to frame segment 30 which is attached to frame 39. Each pinion is provided with peripheral teeth 42 and at least one of the pinions is provided with a toothless peripheral portion 43.

As seen in FIG. 6 one end of a rod 14 is secured in hold 37 in block 20. The axis of hole 37 is parallel to bores 38 and hole 37 passes through the center of block 20. Rod 14 is provided with a roller 15 which as seen in FIGS. 1, 2 and 5 rolls or slides on rail 22 which is in turn secured to frame segment 63. The other end of rod 14 is provided with a hole 50 and a projection 17 and slips into an opening 51 provided in arm 29. Arm 29 is provided with a hole 52 aligned with hole 50. A readily removable pin 18 passes through hole 52 into hole 50 thus securely holding rod 14 in arm 29. Arm 29 is further provided with slot 16 which accepts projection 17. The engagement of projection 17 in slot 16 further increases the strength and stability of the connection of rod 14 with arm 29.

Arm 29 is pivotally mounted to bracket 21 so that when the elevation of rail 22 increases arm 29, along with rod 14, block 20, and forms 10 and 11, pivots upwardly and when the elevation of rail 22 decreases pivots downwardly. The combination of bracket 21 and 29 form carriage 40.

Bracket 21 is bolted to slide 35 which in turn is provided with four guide rollers 53. Slide 35 fits into carrier 27 which is provided with guide channels 25. Guide rollers 53 operate in channels 25 so that slide 35 can be easily raised and lowered within carrier 27. Carrier 27 is provided with guide slot 26. An axle 55 having one end attached to slide 35 passes through slot 26. On the other end of axle 55 is mounted slide roller 36. Slide roller 36 operates on track 28 so that as track 28 becomes lower, slide 35 becomes lower which in turn lowers carriage 40 and fonns l0 and 11 unless forms 10 and 11 are otherwise being supported by rail 22 or racks 31 or 32. Track 28 is rigidly secured to frame 39.

Carrier 27 is provided with upper roller bearings 56 and 57 and lower roller bearings 58 and 59 which operate on upper track 60 and lower tracks 61 and 66 respectively. Tracks 60, 61 and 66 are permanently secured to frame 39. Carrier 27 is transported along the frame on tracks 60, 61 and 66 by means of chains 23 and 24 which are attached to the bottom and top of the carrier respectively. Chains 23 and 24 are operated by a drive means (not shown).

In operation chains 23 and 24 pull carrier 27 along frame 39. Track 28 is at different heights at diflerent positions. Slide roller 36 rides on track 28 and changes in elevational position with track 28 as carrier 27 moves along the frame. Slide 35 is mounted in the canier and is attached to slide roller 36. Slide 35, therefore, also changes in elevational position with the position of track 28. (See FIGS. 2 and 5). As the position of slide 35 changes, the elevational position of bracket 21, arm 29, rod 14, block 20 and forms and 11 change correspondingly provided that the forms are not otherwise supported by rail 22, rack 31 or rack 33 at the particular position.

As carrier 27 transports forms 10 and 11 along frame 39, pinions 67 and 68 will engage racks 31 and 32 respectively causing form 11 to rotate and pinions 12 and 13 will engage racks 33 and 34 respectively causing form 10 to rotate. In the preferred embodiment each of the pinions has a toothless portion 43 which will permit the form to which the pinion is attached to stop rotating when the toothless portion faces the rack which is meant to mate with the particular pinion. Ifthe other pinion attached to the particular form is engaged with its rack, the form will continue to rotate; however, if there is a gap 44 in the rack of the other pinion the form will stop rotatmg.

As best seen in FIG. 3, the apparatus transports the forms through various operations. Chains 24 and 25 transport carrier 27 to coagulant dip tank 66 where frame segments 62 and 63 have not been placed permitting arm 29 to pivot on bolt 19 which holds arm 29 on bracket 21 so that forms 10 and 11 hang in a substantially vertical position. At tank 66, track 28 slants downward so that slide roller 36 rolls down the track which results in the lowering of carriage 40 and forms 10 and 11. The forms are lowered far enough to immerse them in the coagulant which is in dip tank 66.

Track 28 then slants upward and as carrier 27 is transported by chains 23 and 24, roller 36 rolls up track 28 thus lifting forms 10 and 11 from the tank. As carrier 27 is transported to coating tank 41, track 28 again slants downward and the forms are immersed in dipping solution 64. Track 28 again slants upward and the coated forms are removed from coating tank 41.

Frame segments 62 and 63 are placed after the coating tank. Rail 22 attached to frame segment 63 slants upward so that roller rolls up rail 22 to place forms 10 and 1 1 in a substantially horizontal position. At the same time, racks 31 and 32 engage pinions 67 and 68 causing form 11 to rotate and racks 33 and 34 attached to frame segment engage pinions 12 and 13 causing form 10 to rotate. The rotation of the form assists in obtaining a uniform distribution of coating material over the forms. A gap 44 is then provided in racks 31 and 34. Pinions 12 and 68 continue to rotate in racks 33 and 32 respectively until toothless peripheral portions 43 of pinions l2 and 68 face racks 33 and 32 respectively at which point the pinions and attached forms stop rotating. In the case of the particular forms shown, the forms will be oriented in a palm up position when rotation stops.

The forms are then lifted to a substantially vertical position by a lifter (not shown). Excess coating material because of the orientation in the horizontal and vertical positions will run down the back of the glove form shown thus preventing a coating build-up on the palm of the glove where a thin coating is necessary to permit good epidermal perception.

Rail 22 again engages roller 15 while the forms are in a substantially vertical position. As the carrier 27 moves along frame 39, rail 22 slopes downward so the forms again reach a substantially horizontal position. Racks 31, 32, 33 and 34 again engage pinions 67, 68, 12 and 13 respectively and the forms again begin to rotate as they pass through curing oven 69. The cured articles on the forms continue to rotate as they pass through spray washer 70 and dryer oven 7].

Racks 32 and 33 are then provided with gaps 44 and pinions 13 and 67 continue rotating until their toothless portions 43 face racks 34 and 31 respectively when the pinions and forms stop rotating. The forms will now be oriented in a palm down position so the cured articles on the forms can be uniformly printed on the backs of the article by printer 72. The racks again engage the pinions and the forms begin to rotate as a bead is placed on the bottom of the article by beader 73. The forms are again oriented so that the cured articles can be uniformly stripped at stripping station 74.

The forms are then rotated as they are washed in washer 75 and they are again ready to be dipped into coagulant dip tank 66.

What is claimed is:

1. In a machine for forming film articles comprising:

a frame;

a carriage;

a form;

means for rotationally mounting said fonn upon said carriage;

a tank for holding a dipping solution;

means attached to said frame and said carriage for lowering said carriage and said mounted form so said form is immersed in said dipping solution to coat said form;

means attached to said frame and said carriage for raising said carriage so said coated form is removed from said dipping solution; and,

means attached to said frame for moving said form along said frame toward and away from said tank;

the improvement comprising at least two racks mounted on said frame and at least two pinions mounted on said form, each of said pinions having peripherally located teeth, at least one of said pinions having a toothless peripheral portion, the toothless portion on said pinion being proximate teeth on the other pinion; one of said pinions engaging one of said racks and the other of said pinions engaging the other of said racks so that the movement of said form along said frame causes said pinions and said form to rotate and so that a pinion having a toothless peripheral portion engaged in a first of said racks will stop rotating at a predetermined position when the pinion rotates so that its toothless portion faces and is disengaged said first rack and when there is a gap in the second of said racks.

2. In a machine for fonning film articles comprising:

a frame;

a carriage;

a form;

means for rotationally mounting said form upon said carriage;

a tank for holding a clipping solution;

means attached to said carriage and said frame for lowering said carriage and said mounted form so said form is immersed in said dipping solution to coat said form;

means attached to said frame and said carriage for raising said carriage so said coated form is removed from said dipping solution and;

means attached to said frame for moving said form along said frame toward and away from said tank;

the improvement comprising a means for rapidly securely engaging said form upon said machine and easily and rapidly removing said form from said machine, said means including a structure for connecting said form to said machine comprising a rod which fits into an opening formed in said carriage, said rod being secured in said carriage opening solely by an easily removable pin passing through a hole in said carriage, said hole being slightly larger than the size of the cross section of said pin, said pin further extending into a second hole in the side of said rod so that when said pin is removed, said rod can be easily pulled from said opening thus removing said form from said carriage.

3. The improvement in claim 2 wherein said structure further comprises at least one projection extending from said rod, said projection slipping easily into a slot formed in said carriage when said rod is inserted into said carriage opening.

4. In a machine for forming film articles comprising:

a frame;

a carriage;

a form;

means for rotationally mounting said form upon said carriage;

a tank for holding a dipping solution;

means attached to said frame and said carriage for lowering said carriage and said mounted form so said form is immersed in said dipping solution to coat said form;

means attached to said frame and said carriage for raising said carriage so said coated form is removed from said dipping solution and;

means attached to said frame for moving said form along said frame toward and away from said tank;

the improvement comprising at least two racks mounted on said frame; at least two pinions each of said pinions having peripherally located teeth; and means for connecting said pinions to said form; at least one of said pinions having a toothless peripheral portion, the toothless portion on one of said pinions being proximate teeth on the other of said pinions; one of said pinions engaging one of said racks and the other of said pinions engaging the other of said racks, so that movement of said form along said frame causes said pinions and said form to rotate, and so that a gap in one of said racks will permit a pinion having a toothless peripheral portion engaged in the other of said racks to stop rotating at a predetermined position when the pinion engaged in said other rack rotates so that its toothless portion faces said other rack, and in that said machine is provided with a means for rapidly and securely engaging said form upon and easily and rapidly removing said form from said machine, said means having a structure for connecting said form to said machine said structure comprising a rod which fits into an opening formed in said carriage, said rod being held in said carriage opening by an easily removable pin passing through a hole in said carriage slightly larger than the cross section of said pin into a similar hole in the side of said rod.

5. In a machine for forming film articles comprising:

a frame;

a carriage;

a plurality of forms;

means for mounting said forms upon said carriage;

a tank for holding a dipping solution;

means attached to said frame and said carriage for lowering said carriage and said mounted forms so said forms are immersed in said dipping solution to coat said forms;

means attached to said frame and said carriage for raising said carriage so said coated forms are removed from said dipping solution and;

means attached to said forms for moving said forms along said frame toward and away from said tank;

the improvement comprising means for individually rotating each of said forms upon said carriage, said means comprising a support attached to and extending from said carriage, a block attached to said support, a plurality of axles, one end of each of said axles being attached to one of said forms, each of said axles projecting through one of a plurality of holes in said block so each of said forms is able to rotate in relation to said block, at least one rotating device attached to the other end of each of said axles, a track and means for mounting said track to said frame, said mounting means being located between said frame and said forms, said rotating device being able to roll along said track causing said rod and said form to rotate. 6. The machine claimed in claim 5 wherein said track is a rack and said rotating device is a pinion

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3889632 *May 31, 1974Jun 17, 1975IbmVariable incidence drive for deposition tooling
US4439391 *Jan 7, 1981Mar 27, 1984International Paper CompanyPolymeric sheets
US6746720 *Jan 4, 2001Jun 8, 2004Honda Giken Kogyo Kabushiki KaishaConveyance apparatus and conveyance method
Classifications
U.S. Classification118/416, 118/425, 118/423
International ClassificationB29C41/14
Cooperative ClassificationB29C41/14, B29L2031/4864
European ClassificationB29C41/14