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Publication numberUS3390660 A
Publication typeGrant
Publication dateJul 2, 1968
Filing dateJul 28, 1966
Priority dateJul 28, 1966
Publication numberUS 3390660 A, US 3390660A, US-A-3390660, US3390660 A, US3390660A
InventorsMcdermott Charles H
Original AssigneeWeyenberg Shoe Mfg Company
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Spray coater for shoes and the like
US 3390660 A
Abstract  available in
Images(3)
Previous page
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Claims  available in
Description  (OCR text may contain errors)

July 2. 1968 c. H. MCDERMOTT 3,390,660

SPRAY COATER FOR SHOES AND THE LIKE Filed. July 28, 1966 3 Sheets-Sheet 1 INUENT'QK @0924. :5 H. Mc 05.0mm

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ATTDRNEY$ J ly 1968 c. H. M DERMOfT 3,390,660

SPRAY COATER FOR SHOES AND THE LIKE Filed. July 28, 1966 3 Sheets-Sheet 2 I NV E NTO 2 Cline 1.5 5 H. M4. DEEmarr July 2, 1968 c. H. MCDERMOTT 3,390,660

SPRAY COATER FOR SHOES AND THE LIKE 3 Sheets-Sheet 3 Filed July 28, 1966 \1 I llllm i O {a 0 J4 J 7a 25 o 7:? r f -MW H INUEN'T'OE. O/flAEfi h. 046059010- av AM, Maw 3244* ATTORNE I$ United States Patent 3,390,660 SPRAY COATER FOR SHOES AND THE LIKE Charles H. McDermott, Milwaukee, Wis, assignor to Weyenberg Shoe Manufacturing Company, mlwaukee, Wis., a corporation of Wisconsin Filed July 28, 1966, Ser. No. 568,448 4 Claims. (Cl. 118-2) ABSTRACT OF THE DISCLOSURE When work to be coated is placed on a turntable, a microswitch is closed to initiate rotation of the turntable and the operation of a spraying device which delivers dye or wax or other coating to the work in the course of work rotation. After a single rotation, the work comes to rest and the spray concurrently terminates.

The rate of rotation is sufficiently slow so that no connection of the shoe to the turntable is required. The weight of the shoe on the turntable is not quite suflicient to close the switch but the momentum of the shoe as it is placed on the turntable is sufiicient to initiate the operation and the rotation of the turntable earns the switch to hold it closed until one revolution has been completed.

In one embodiment the shoe is oh? center on the turntable and the axis of the spray is oblique, the objective being to provide the heaviest coating on the vamp portions of the shoe. This gives remarkably uniform results but even more uniformity is secured in a second embodiment in which the shoe may be centered but a pattern rotatable with the turntable moves the spray gun back and forth so that its distance from the shoe is substantially constant.

Background of the invention Shoes have been spray coated by hand for approximate- 1y 30 years, more or less. The coatings used have never been quite uniform. In the hand coating operation, the operator places one hand within the shoe and turns the shoe from side to side in an intricate pattern while manipulating the spray gun with the other hand. This Pattern of manipulation is such that considerable skill is inherently required and numerous chances of error are involved. The device of the present invention is not particularly more rapid than the manual coating procedure but it does give very substantially improved uniformity of coating, with more economical use of materials and without any requirement for special skill or training. The time required is about two minutes. The material used is only 2 to 2 /2 ounces per dozen shoes when the present invention is employed as compared with 4 ounces per dozen in the hand operation. Particulars are by way of example and not by way of limitation.

Description of the invention In the drawings:

FIG. 1 is a plan view fragmentarily showing apparatus embodying the invention.

FIG. 2 is a view of the apparatus in side elevation with portions shown in section.

FIG. 3 is an enlarged fragmentary detail view taken in section on the line 3-3 of FIG. 2.

FIG. 4 is an enlarged fragmentary detail view showing the microswitch in elevation and the control cam in axial section.

FIG. 5 is a bottom plan view of the cam.

FIG. 6 is a view similar to FIG. 2 showing a modified embodiment of the invention.

FIG. 7 is a view taken in section on the line 7--7 of FIG. 6.

3,390,660 Patented July 2, 1968 "ice The table 6 supports a bearing 8 for a tubular spindle .10 having upper and lower collars 12 and 14 fixing its axial position with respect to the bearing. Support 16 de pending from the table carries a gear-head motor 18 which is connected by belt 20 with a pulley 22 on the spindle. The output shaft 24 of the motor operates at about 57 r.p.m. and the spindle is turned at approximately 19 r.p.m. It will be understood that the particulars are given by way of example and not by way of limitation.

The shoe to be coated is shown at 26. It is mounted on a turntable support 28 having a shouldered oifset at 30 for the heel 32 of the shoe. Thereby the shoe is so located that its vamp portion 34 is centered over the spindle 10.

The turntable 28 is disposed at the upper end of a shaft 36 which extends axially through the spindle and rotates therewith. The shaft is axially yieldable subject to the bias of supporting spring 38. Its range of movement is preferably limited by an arrangement which includes a transverse bolt 49 through the spindle and through a slot 42 in shaft 36. The length of the slot determines the range of vertical movement permitted to the shaft 36. The bolt also assures transmission of rotative movement from the spindle to the shaft.

Below the spindle 10 the shaft 36 carries at its lower end a cam disk 44 having in its periphery an arcuate notch 46 spanned by a plate 48. Projecting into the notch 46 at a level above the bottom of the disk but normally out of contact with plate 48 is the roller 50 at the upper end of the actuator 52 of a normally open microswitch 54. The arrangement is such that when the cam disk 44 is engaged with roller 50, the microswitch is held closed. When the rotation of the cam disk brings the notch 46 into registry with roller 50, the microswitch opens. There is very slight clearance between the roller 50 and plate 48. The spring 38 is so related to the weight of the shoe 26 as to be normally capable of supporting the shaft 36 in a position in which there is no contact between plate 48 and the roller 50. However, the downward momentum of the shoe at the time it is placed on the support 28 will be suflicient to depress the shaft 36 to close the microswitch. The microswitch is connected in series with the motor 18 to initiate motor operation for the rotation of the spindle and the shaft. During initial motor operation the unnotched portion of the cam 44 will ride onto the roller 50 to hold the microswitch closed for continued operation for approximately one revolution.

The microswitch is also in circuit with a solenoid 60 having its armature 62 connected by yoke 64 with the trigger 66 of a conventional spray gun 68, which has an air supply connection at 70 and a coating solution hose at 72. The nozzle 74 of the spray gun is of a type to project a spray of coating in the form of amist rather than a jet. The coating may, for example, be a dye solution, or a wax and solvent solution or suspen- SlOIl.

It Will be noted that the axis of the spray is indicated by a broken line at 76 which is oblique with reference to the plane of rotation of the shoe on shaft 36. Due to the oblique inclination and due to the fact that the shoe is somewhat offset, the vamp portion of the shoe will get more of the coating than either the toe or the heel. This is desired because the vamp has greater area. The angular movement of the toe 78 across the spray is relatively much more rapid than the movement of the vamp portions 34. The movement of the heel or counter 80 is still more rapid.

In use, the operator simply lays the work upon the rotatable support 28. The impact closes the switch to start the rotation of the shaft and the work and at the same time to initiate the operation of the spray. The notched portion of the cam 44 will pass from registry with the roller 50 while the motor continues in operation. The plate 44 will then hold the switch closed until one revolution has been completed. At that time the shaft and the work will come to rest and the spray will be cut off. The operator will remove the coated shoe and replace it with a new work piece, whereupon the operation will be repeated.

The coating operation differs radically from that which has been used for hand coating over a period of years. In the use of the instant device, great uniformity 18 secured by the uniform rate of rotation, the uniform distance of the spray from the axis of rotation, and also by the offset of the shoe in a plane of rotation to which the axis of the spray is oblique.

As compared with the old hand-tooling operation, the device shown in FIGS. 1 to 5 inclusive gives uniformity which is visually apparent. However, even greater uniformity is provided by the device shown in FIGS. 6 and 7 wherein the arrangement is identical except that the spray gun 68 is mounted on a carriage 71 which comprises a bar 73 reciprocable through guide bearings '75 and having a roller crosshead 78 operable on a plate 80 on the underside of the table 6. Tension springs 82 tend to move the carriage to the right as viewed in FIGS. 6 and 7 to hold the cam follower roller 84, mounted on the bar 73, against a cam 86 which is carried by the shaft 36. By reason of this arrangement, the spring is held at a constant or substantially constant distance from the shoe in all positions of the shoe as it rotates on the turntable 28.

I claim:

1. Apparatus for the spray coating of a work piece which comprises, in combination, a support for a work piece, means for rotating the support to rotate the work piece in a predetermined plane, and a spray gun directed toward the work piece support, the work piece support comprising a spindle, a shaft extending through the spindle and axially yieldable with respect to the spindle, a turntable n the shaft, a spring support for the shaft having sufiicient bias to sustain the shaft and a work piece on the turntable, the means for rotating the support comprising a motor having driving connection with the spindle, a cam on the shaft for rotation and axial movement therewith, said cam having a recess of limited angular extent, a motor energizing circuit having switch means including an actuator adapted to be engaged by the cam for holding the switch means closed, the switch means being normally open and adapted to be closed by the momentum of a workpiece placed on the turntable, whereby to initiate rotation of the turntable and the workpiece, the switch means being held closed during such rotation by engagement of the cam therewith.

2. A device for spray coating shoes and comprising a rotatable and yieldable support for a shoe to be coated, a spindle having an axially yieldable shaft connected with the support, means mounting the spindle for rotation, a driving connection from the spindle t0 the shaft, a spring sustaining the support and shaft from the spindle and having sufficient bias to sustain a shoe on the support, the spring being yieldable in response to the momentum of the shoe as it is placed on the support, a motor having a driving connection with the spindle, a switch operatively connected in circuit with the motor and having an actuator, a cam connected with the shaft and engageable with the actuator for holding the switch closed in the course of shaft rotation, said cam having a portion provided with a recess of angularly limited extent which is normally out of contact with the actuator and engage able therewith when the shaft is depressed by the momentum of a shoe pressed on the support, the bias of the spring being sufficient to release the actuator from the recessed portion of the cam after the shaft and support have made a predetermined rotation, a spray gun having a nozzle directed toward the support upon an axis which is oblique with reference to the plane of rotation of the support, electromagnetic means for energizing the spray gun, and means controlled by the switch for supplying current to said energizing means.

3. A device according to claim 2 in which the said driving connection comprises a cross pin on the spindle for which the shaft is provided with a slot.

4. A device according to claim 2 in which the cam comprises a disk having a peripheral notch spanned by a plate to provide said recess, the actuator having a roller normally at a level below the plate and above the bottom of the disk.

References Cited UNITED STATES PATENTS 1,917,470 7/1933 Uden 1183 2,316,959 4/1943 Hinkley et al. 1l8321 2,770,211 11/ 1956 Gustafson 1l8320 X 3,324,625 6/1967 Dulmage 118323 X FOREIGN PATENTS 1,192,049 4/1959 France.

CHARLES A. WILLMUTH, Primary Examiner. JOHN P. MCINTOSH, Assistant Examiner.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1917470 *Oct 31, 1932Jul 11, 1933Uden Jacob TShoe dressing machine
US2316959 *May 17, 1939Apr 20, 1943Corning Glass WorksApparatus for coating articles
US2770211 *Aug 20, 1954Nov 13, 1956Lamb Grays Harbor Co IncGlue applying apparatus
US3324625 *Oct 11, 1963Jun 13, 1967Dow Chemical CoEquipment and method of controlled peripheral shrink
FR1192049A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3867899 *Sep 24, 1973Feb 25, 1975True Brothers Conveyors LtdAutomatic spraying machines
US4056075 *Jan 12, 1976Nov 1, 1977Abe SeidermanAutomatic hot melt adhesive depositing machine
US4312292 *Sep 22, 1978Jan 26, 1982The United States Of America As Represented By The Administrator Of The National Aeronautics And Space AdministrationSpray coating apparatus having a rotatable workpiece holder
US6641666 *Oct 2, 2001Nov 4, 2003Ppg Industries Ohio, Inc.Method and apparatus for coating a substrate
US6691719 *Jan 12, 2001Feb 17, 2004Applied Materials Inc.Adjustable nozzle for wafer bevel cleaning
EP0070955A2 *Oct 2, 1981Feb 9, 1983Soc. SOLES r. 1.Spraying machine for painting shoe bottoms
Classifications
U.S. Classification118/679, 118/321
International ClassificationA43D95/00, A43D95/06
Cooperative ClassificationA43D95/06
European ClassificationA43D95/06