US1380361A - Coating apparatus - Google Patents

Description

J. W. COSGROVE. COATING APPARATUS. APPLICATION FILED Nov. a. 1918.

Patented June 7, 1921 4 SHEETS-SHEET l- J. W. COSGROVE. COATING APPARATUS. APPLICATION FILED NOV,8,1918. I

Patented June 7, 1921.

4 SHEETSSHEET 2- Wh QM J. W. COSGROVE. COATING APPARATUS. APPLICATION FILED NOV- 8, 191a.

L PM Z i m% g P Fig. 4

I. W. COSGROVE. COATING APPARATUS. APPLICATION mu; Nov a, 1915.

Patented June 7, 1921.

4 SHEETSSHEET 4.

- UNHTED STATES PATENT OFFICE.

JOHN W. COSG-ROVE, OF MEDIEORD, MASSACHUSETTS, ASSIGNOR 1'0 UNITED SHOE MACHINERY CORPORATION, OF PA'IERSON, NEW JERSEY, A. CORPORATION OF NEW JERSEY.

seosei.

COATING APPARATUS.

Patented June 7, 1921.

Application filed November 8, 1918. Serial No. 261,684.

To all whom it may concern:

Be it known that I, J OHN W. Cosenovn, ,a citizen of the United .States, residing at Medford, in the county of Middlesex and State of Massachusetts, have invented cer-. tain Improvements in Coating Apparatus, of which the following description, in connection with the accompanying drawings, is a specification, like reference characters on the drawings indicating like parts in the several figures. I

This invention relates to apparatus for applying a fluid coating to various articles.

. cover plate,

It finds an important application in cementing parts of shoes, as the soles, my preferred embodiment being arranged to cement or wet simultaneously both sides of a sole.

An object of the invention is to supply effectively the coating fluid to the lower of two applymg members, while permitting its movement with respect to the companion applying member. In accomplishing this, I mount a fluid tank or receptacle pivotally between its extremities below an upper applying member, and arrange in the receptacle a lower applying member movable to take fluid therefrom and traveling with the receptacle into or out of cooperation with the upper applying member. The lower applying member is shown in the form of a roll journaled near one end of the fluid tank and extending above the side walls, it being balanced by the portion pf the tank on the opposite side of the pivotal support. Preferably, the portion of the tank at one side of the roll is covered by a plate which may be movable to cooperate with said roll for controlling the fluid carried thereby. To avoid interference with this adjustable as in filling the tank, the roll may extend less than the full width of the tank, there being at its end an opening with a cover. I

It is often difficult, this being especially true of an applying member supplled with by a receptacle delivering at,

. the delivery opening in the tank, with "the periphery of which roll a slide or scraper riphery of the roll.

cooperates to govern the quantity of fluid carriedby the roll to the work, the adjustment of the valve and slide to give the correct feed of fluid may be hard to obtain.

If the valve permits less fluid to pass than does the slide, too light a coating may result. If, on the other hand, the valve is set to deliver an excess of fluid, this tends to receive fluid from the applying mem er and temporarily retain it in contact therewith. Between the applyin member and auxiliary-receptacle is a disc arge opening with means for varying the flow therefrom. With such an organization the valve from the main supply may be so opened that a quantity passes not less than is to be applied to the work and the discharge from the auxiliary receptacle adjusted to give the desired application. Then, if the flow through the valve is somewhat greater than necessary, the excess will be retained within this receptacle. When a rotatable roll is employed as an applying member, the preferred location of the auxiliary receptacle is at the down-going side of the roll, it having side walls contacting with the ends of the roll, and a bottom wall a portion of which is arranged to move toward and from the pe- Viscous coacting fluids of the character of cement tend to draw out in strings between the work and the up-going side of a rotatable applying member, and, gathering upon portions of the apparatus, as the frame, drip back upon the work. Another object of the invention is to prevent this by means which will gather and effectively dispose of the strings. This is accomplished by a member so situated that the strings are received upon its surface, this member cooperating with the applying member above the plane of. the work and being rotated in the same direction to so deliver the accumulated strings to the applying Lmember that they v are returned to the supply withoutan opportunity to fall upon the work. Herein is illustrated for this purpose a roll driven from the applying member through an ec- ,-centric operating pawls acting upon a ratchet wheel. This mechanism allows the stringereceiving roll to be positively driven in the desired dirction and at a suitable speed. The string-receiving member is preferably variable in position so it may be most effectively located with regard to the surface of the applying member. It may, when in the form of a roll, be journaled in arms pivoted on the frame of the apparatus and arranged to be fixed in different angular positions.

Still another object of the invention is to provide an applying member which will uniformly coat the work. In applying rolls having longitudinal series of depressions,

the coating fluid, especially when highly co hesive, as is cement, may be more thickly laid upon the work at certain points, near the center of the roll for example, and inseparated areas a gradual stead of spreading to the more thinly'coated areas, it tends rather to remain at the spots at which it is applied, or even for the deposlted areas to draw away from those about them. To prevent this, I connect each longitudinal series of depressions by grooves between adjacent depressions, these grooves belng preferably al-ined to form continuous passages throughout the series. Through these the distribution of fluid may be equalzed, and after the application of the coating to the work the connecting lines between the separated areas formed by the depres- SlOIlS. cause the latter to draw together. The passages between the depressions are shown at the forward ortion, considered with reference to the direction of rotation of the roll, since thereby, as the applying surface meets the work, each longitudinal series deposits a continuous line of the fluid which 1S effective in producing in the after-applied coalescence, as work and roll separate in the advance of the work and the rotation of the roll. The referred construction of a roll having t ese separated depressions with connecting passages, includes circumferential grooves about the periphery of the roll, with longitudinal slots intersecting the grooves and bars earned by the slots and projecting into the grooves. Through the walls of the depressions adjacent to the bars are connecting grooves, which may be furnished in part by a reduction of the edges of the bars.

Other objects of the invention will appear in connection with the following description and the claims, illustrated by the accompanying drawings, in which,

Figure 1 is a side elevation of one embodiment of my invention, parts being broken away;

' Fig. 2 is an end elevation looking from.

portion of the perspective view of the Fig. 10 is a detail in rear elevation of the string-receiving roll and more closely associated elements. 7

At 10 appears a base formed with an overhanging arm 12 and a short vertical standard 14 situated at the opposite side of the base from the arm. Mounted to turn in the standard and base-portion of the arm are trunnions 16 projecting from the side walls of a horizontally extending tank or receptacle 18 for coating fluid, this tank having a portion 20 carrying the trunnions and a wider portion 22. The tank vhas an inclined bottom extending downwardly along the portions 20 and 22, and in the latter portion journaled. in the side walls is a lower applying roll or member 26. 'I he weight of the applying roll and containing portion 22 of the tank is approximately balanced by the'portion 20 on the opposite side of the trunnions. The shaft of this roll 1s connected by a'coupling 28 permitting both vertical and horizontal movement to a shaft 80 journaled in the frame and having fixed upon it a gear 32 meshing with-a gear 68 fast on the shaft of an upper applying roll 66, to be later described, this gear, in turn, being rotated b a pinion 34 secured upon a main driving s aft 36 rotatable in the arm portion of the frame. Carriedbythe shaft 36 are fast and loose pulleys 38 for cooperation with a belt connected to some suitable source of power. The top of the portion 20 of the tank is closed to prevent evaporation of the contained fluid by a plate t0, mounted to slide in ways so that it may not only cover the tank but may also be utilized to control the coating of fluid upon' the periphery of the roll 26. To adjust this plate 40 so that the distance of its inner edge from the roll may be varied, it has at its outer end a depending arm 42 slotted to receive a screw 44 which rotates in it and is threaded into the tank. When correctly positioned by the screw, the inner. edge of the plate acts as a scraper, removing from the upgoing side of the roll 26 the excess of fluid to the tank. the roli 26 ispreferably made trolling plate lOprevents convenient access the tank.

less in. length than the width of the tank portion 22, and at one end of the roll there is an openinginto the tank closed by a removable cover plate 46. Through this opening the coating fluid may be introduced into the tank when necessary; Below the supply opening in the vertical wall of the tank portion 22 is an opening through which the contents of the tank may be drawn, this being provided with a cover plate 48. Supported on the sides of the tank adjacent to the top of the roll 26 and preferably extending for substantially its full length is a table 50 on which the .work may be placed by the operator for delivery to the coating instrumentalities. The work, after being operated upon, is received upon a grating 52 mounted upon," the extremity of the tank and having beneath it an incline 54, which serves to return any cement which may drip from the work through the grating back to The tank 18 with the roll 26 is yieldably held in different vertical positions by a headed rod 56 extending downwardly through an opening in a lug 58 upon the end of the tank. The rod is supported by a hand wheel 60 through which it is threaded, and is retained in its adjusted position by a lock nut 62. A spring 64 surrounds the rod between the nut and tank lug, forcing said lu upwardly against the head of the rod.

Vith the lower applying member coiiperates the upper applying member or roll 66 journaled in the arm 12 of the frame with its shaft carrying the gear 68. The gearing 32, 34 and 68 rotates the applying rolls in opposite directions, as is indicated by the arrows in Fig. 1 of the drawings, so that the work inserted between them is carried from the table 50 to the grating 52. The upper surface of the arm 12 is finished to receive a. fluid tank or receptacle 7 0 having slotted lugs at the bottom which are enaged by opposite pivoted securing screws 2. The tank 70 is closed at its top by a cover 74. It delivers to the upper side of the roll 66 through an opening controlled by a valve 76. The amount of fluid carried to the work upon the down-going side of the roll is governed by a slide 78 (Fig. 3), movable in ways in the top of the arm 12 and fixed in position by screws 80 extend ing into the arm through elongated openings. At the opposite side of the roll is a slide 82 similarly mounted and acting to prevent the flow of fluid from the tank over the roll in this direction. The adjusting screws for both'slides are mounted wholly beneath the tank 70 so that they are accessible only when this is removed, this arrangement avoiding needless tampering with the adjustments by unskilled operators. Contacting with each end of the roll 66 at its upper side directly beneath the tank is a slide 84, extending for nearly the entire distance between the adjacent edges of the peripheral slides and having an extension 86 lying along the edge of the slide 82. Threaded through a portion of the frame adjacent to each of the slides 84 is a screw 88 having a reduced cylindrical tip entering a socket in the corresponding slide and fixed in the position to which it may be turned by a nut 90. By these screws the slides may be forced firmly against the ends of the roll to make tight joints and prevent leakage. It is difiicult to so form the parts as to prevent the escape of the fluid from the top of the roll through the passages in dicated at 92 between the extensions 86 of the end slides and the edges of the slide 82. To obviate this difiiculty, a movable packing member extends across each passage (Fig. 5), it preferably consisting of a block 94 mounted in a recess 96 in the slide 82. Its outer end is forced against the inner side of the slide extension by a spring 98 surrounding a projection from the block and being "seated in a bore in the slide 82. These members 94, regardless of the relation between the opposite portions of the cooperating slides, effectively close the passage between them against the fiow of fluid.

If the valve 76 allows more fluid to flow from the tank 70 than can pass the slide 7 8 when the latter is set to leave upon the roll 66 a layer of the proper thickness, the excess accumulating on the top of the roll will find its way beneath the slide 82. It will then run down the up-going side of the roll and falling upon the work will cause it to be unevenly coated on its upper face. To remedy this, I provide an auxiliary receptacle 100 to receive temporarily any such excess and control the passage of the coating upon the roll to the work. The receptacle 100 is. shown as secured by upwardly extending arms 102, 102 to the under side of'the outer extremity of the slide 78. It has side walls 104, 104",(Fig. 4 projecting over the ends of the roll 66 at the feed side and a curved or inclined bottom wall 106 which reaches nearly to the periphery of the roll. At the inner end of the side walls are vertical ways 108, 108 to receive packing strips 110, 110 which may be of felt. At the bottom of each way behind the packing strip is a backing plate 112, with Y which contacts a screw 114 threaded through the wall 104 and operating to press its strip 110 into such contact with the end of the roll that fluid con tained in the tank 100 cannot pass in this direction. In a way 116 at the inner edge of the bottom 106 of the tank is a strip 118 which also may be of felt and have angular end portions 120 overlying beveled ends 122 of the roll '66. This strip also has a backing plate 124 against which press screws 126. By these screws the opening between the bottom of the tank and the periphery of the. upper applying roll may be varied to determine the thickness of the film of coating fluid upon the roll. Screws 128 are threaded through the tank walls for contact with the portions 120 of the strip 118 to enable such a pressure to be applied to them that they will act with the strips 110 to close the space between the side walls of the tank and the ends of the applying roll.

Both applying rolls are preferably pocketed or supplied with depressions 130 (Figs. 6 to 9) arranged in series both longitudinally and circumferentially of the rolls to re-- ceive the coating fluid and transfer it to the work, and to render the coating applied by the rolls as nearly as possible uniformly continuous, the depressions of each longitudinal series are cross-connected by alined grooves 132. These extend through the circumferential walls of the depressions to furnish continuous passages, preferably in proximity to, their forward longitudinal walls, as the rolls rotate. As each longitudinal series of depressions comes into contact with the work, the coating fluid is first continuously applied along the line of the grooves, the pressure as the depressions advance over the work tending to force the fluid through the grooves from depression to depression so that the amount in each depression in the entire series will be substantially equal. The joining bv the lines of fluid of the greater areas or spots laid upon the work by the depressions also promotes the coalescence of the latter, resulting in a .more continuous coating. .In forming the depressions in the rolls there may first be made circumferential grooves, as by milling, leaving equally spaced circumferential walls 134 having their sides beveled. Then slots are cut parallel to the axis of the rolls more-deeply than the grooves, and in these are fixed bars 1336 giving projecting longitudinal walls 138. To produce the longitudinal grooves or passages 132, the circumferential grooves are finally milled through, and since the material of the bars 136-must, to permit them to be conveniently handled, be as a whole thicker than it is desired the walls 138 shall be, this milling is caused to remove a portion from one side of each bar, thus furnishing a portion of the'adjacen longitudinal passage.

s the work emerges from the rolls, the coating fluid, if viscous, will be drawn between it and the rising periphery of the roll '66 in strings, these as they are elongated breaking and snapping back toward the roll where they are liable to gather upon the frame arm 12. These, ac cumula'ting', fall back upon the work and give an uneven coating. 0 dispose of'these strings, I mount above the grating 52 a string receiving D member furnished by a roll 140 journaled in contact with the applying roll so it may not,

take the coating fluid fromor be driven by said applying roll. The roll 140 is rotated at the desired speed, this being preferably less than the peripheral travel of the applying roll and in the same direction, from an eccentric 148 secured upon the applying roll shaft. Cooperating with the eccentric is an arm 150 guided'by the journal of the roll 140 and having pivoted on it pawls 152, two of these being shown, one arranged to push and the other to pull the teeth of a ratchet wheel 154 fast on the shaft of the receiving roll. A spring 156 connects the pawls to draw them into engagement with the ratchet teeth. The throw of the eccentric and the engagement of the ends of the pawls with the ratchet teeth are such that the receiving roll is rotated in the direction and at the speed sought. As the strings breaking fly back toward the applying roll. they are caught by the roll 140 and are carried upwardly into the depression between it and the applying roll, from which they are removed by the periphery of the latter. Since they are carried at once to the top of the roll and into this depression, rather than beneath it and into a channel open at the bottom, they have no opportunity to drip from the receiving roll itself before being carried back to the source of fluid supply by the applying roll. 7

In using the apparatus, the soles, if this is the work to be coated, are laid one by'one upon the table 50 and their ends introduced between the applying rolls 26 and 66. They are caught by and carried through these and delivered upon the grating 52, the upper and lower sides respectively receiving a coating from the corresponding rolls. The thickness of the coating carried up by the depressions in the roll 26 is determined by the. setting of the plate 40. That of the upper roll is governed by the position of the strip 118 of the auxiliary tank. The valve 76 of the main supply tank is so set that not less than the requisite amount of the coating fluid will flow therefrom upon the top of the roll. If this amount be exceeded, it will be carried by the roll into the tank 100 and there retained arms 142 which are pivoted upon brackets this excess for a considerable period, so that no attention need be given to it by the operator other than to occasionally empty it, as at the end of a working period.

I-Iaving described my invention, what I claim as new and desire to secure by Letters Patent of the United States is 1. In a coating apparatus, an upper applying member, a receptacle pivoted between its extremities to move toward and from the upper applying member, and an applying member journaled in the receptacle beneath the upper applying member.

2. In a coating apparatus, an upper ap plying member, a receptacle pivoted be tween its extremities to move toward and from the upper applying member, and an applying member journaled in. the receptacle near one extremity and being balanced by the portion of the receptacle on the opposite side of its pivots.

3. In a coating apparatus, supports, a tank pivoted upon the supports and extending in opposite directions therefrom and having a bottom wall inclined from one extremity to the other, and an applying roll j ournaled in the side walls of the tank near the-lowest portion of the inclined wall and extending above the side walls.

4. In a coating apparatus, a tank for fluid, an applying roll journaled across one extremity of the tank and extending for less than the full width thereof, a cover plate for the extremity of the tank opposite the roll, and a removable cover for the tank at the end of the roll. I

5. In a coating apparatus, a tank for fluid, an applying roll journaled across one extremity of the tank and extending for less than theffull width thereof, a cover plate for the extremity of the tank opposite the roll, said cover plate cooperatin with the roll and being movable toward and from the same to control the fluid thereon, and a removable cover for the tank at the end of the roll.

6. In a coating apparatus, a tank provided with a main portion and an extension therefrom of less width than the main portion, an applying roll journaled in the main portion of the tank and extending less than the width thereof, there being an opening in the tank at the end of the roll, trunnions projecting from the tank extension at opposite sides, and supports in which the trunnions are pivoted.

7. In a coating apparatus, a tank provided with a main portion and an extension therefrom of less width than the main portion, an applying roll journaled in the main portion of the tank and extending less than the width thereof, there being an opening in the tank at the end of the roll, trunnions projecting from the tank extension at opposite sides, supports in which the trunnions are pivoted, and a cover plate for the'top of the extension movable toward and from member.

10. In a coating apparatus, an applying member, a receptacle arranged to supply fluid thereto, and a receptacle arranged to receive fluid from the applying member and temporarily retain it in contact therewith.

11. In a coating apparatus, an applying member, a' receptacle arranged to supply fluid thereto, an auxiliary receptacle cooperating with the applying member, said auxiliary receptacle forming a discharge opening, and means for varying the discharge from the opening.

12. In a coating apparatus, an applying member, a receptacle arranged to supply fluid thereto, a receptacle arranged to receive fluid from the applying member and temporarily retain it in contact therewith,

' and means for varying the time of retention.

13. In a coating apparatus, an applying roll arranged for engagement at its lower side with the work, a tank delivering to the upper portion of the roll, and a tank'coeperating with the side of the roll.

14. In a coating apparatus, a rotatable applying roll arranged for engagement at its lower side with the work, a tank delivering to the upper portion of the roll, and a tank cooperating with the down-going side of the roll.

15. In a coating apparatus, an applying roll, a tank delivering to theupper portion of the roll, and a tank cooperating with the side of the roll and having a bottom wall arranged to move toward and from the roll.

16. In a coating apparatus, the combination with an applying roll, of a tank delivering to the upper portion of the roll, a receptacle situated at one side of the roll and havin an opening into which the roll extends, side walls contacting with the ends of the roll, and a bottom wall cooperating with the applying surface of the roll.

17. In a coating apparatus, the combination withanv applyingroll, of a receptacle situated at one side of the roll and having an opening into which the roll extends, walls situated at the ends of the roll, and packing strips interposed betweenthe side walls and the ends of the roll.

. plying "member fora coatingsubstance, said situated at one side of the roll and having an opening into which the roll extends, walls situated at the ends of the roll, packing strips interposed between the. side walls and the ends of the roll, and a member movable between the bottom wall and the periphery of the roll.

19. In a coating apparatus, a rotatable-apmember tending to produce strings of the coating substance, and a string receiving member rotatable in cooperation with the applying member, said string-receiving mem ber being maintained out of contact with the work.

20. In a coating apparatus, a rotatable applying member for a coating substance, said member tending .to produce strings of the coating substance, and a string-receiving member rotatable out of contact with, and above the plane .of the work about an axis parallel to that of the applying member.

21. In a coating apparatus, a rotatable applying member for a coating substance, said member tending to produce strings of the coatmg substance, and a string-receiving member cooperating with and arranged to be varied in its position toward and from the applying member.

22. In a coating apparatus, a rotatable applying member for a coating substance,

said member tending to produce strings ofthe coating substance, a string-receiving roll ournaled adjacent to the applying member, and means arranged to permit the space between the applying member and string-receiving roll to be varied.

2.3. In a coating apparatus, a rotatable applymg member for a coating substance, said member tending to produce strings of the coatlng substance, a string-receiving roll, pivoted arms in which the roll is journaled,

and means for fixing the arms in different angular positions.

24. In a coating apparatus, a rotatable applying member for a coating substance,

said member tending to produce strings of the coating substance, a string-receiving member, an eccentric rotatable with the applymgmember, a ratchet wheel carried by the string-receiving member, and a pawl m ovable by the eccentric and; contacting with the ratchet wheel.

25.1 In a coating apparatus, a rotatable applying member for a coating substance, a Supporting shaft therefor, a string-receiving roll mounted with its axis parallel to the applying roll, and means carried by the shaft of the applying roll for rotating the stringreceivlng roll.

26. In a coating apparatus, a rotatable applying member for a coating substance, a

supporting shaft therefor, a string-receiving roll mounted with its axis parallel to the pp y g roll; a driving m mber fixed to the applying-roll shaft, an arm recipro' cated by the driving .memben, operating pawls carried by the arm, and a ratchet wheel mounted with the string-receiving roll depressions to receive a coating substance,

there being a continuous passage connecting the depressions of a series.

29. In a coating apparatus, a rotatable applying roll provided with a series of depressions extending longitudinally of the roll, there being passages connecting adjacent depressions near their forward portion. 30. In a coating apparatus, an applying roll provided with circumferential grooves and longitudinal slots intersecting the grooves, and bars carried by the slots and projecting into the grooves, there being rooves dividing the walls between circumierential grooves adjacent to the bars.

31. Ina coating apparatus, an applying roll provided with circumferential grooves and longitudinal slots intersecting the grooves, and bars carried by the slotsand projecting into the grooves, one edge of each bar being reduced and there being adjacent to these reduced portions grooves through the walls between the circumferential grooves.

32. In a coating apparatus, a fluid receptacle having a delivery opening, a roll rotatable at the delivery opening, amovable member cooperating with the roll to control the fluid and tending to form a passage through which fluid may flow, and a yieldable member extending into the passage.

33. In a coating apparatus, 'a fluid receptacle having a delivery opening, a roll rotatable at the delivery opening, a movable member cooperating with the roll to control the fluid and tending to form a passage through which fluid may flow, there being a recess adjacent to the passage, a block situated in the recess and extending into the passage, and a spring between the end of the recess and the block.

34. In a coating apparatus, a frame, a fluid receptacle carried thereon and having a delivery opening, a roll rotatable in the frame at the delivery opening, a plurality of movable members cooperating with the roll to control the fluid flow and which may form in their movement a passage through which fluid may escape, and a packing member projecting into .the passage.

35. In a coating apparatus, a frame, a fluid receptacle carried thereon and having a de ivery pen g, a .r ll rotatable in the 130.

frame at the delivery opening, a plurality of movable members cooperating with the roll to control the fluid flow and which may form in their movement a passage through which fluid may escape, one of said members I being provided with a recess, a block mounted in the recess, and a spring arranged to force the block into the passage into contact with another controlling member.

36. In a coating apparatus, a frame, a fluid tank carried thereon and having a delivery opening, a roll rotatable in the frame at the delivery opening, a slide cooperating with the periphery of the roll and havin a 5 recess at one extremity, a movable mem er closing the opening at the end of the roll between the tank and frame, and a yieldable block mounted in the slide-recess and contacting with the movable member.

37. In a coating apparatus, a rotatable applying member for a coating substance, said member tending to produce strings of the coating substance, and a string-receiving member rotatable above the plane ofthe work in' contact with and in the same direction as the applying member.

In testimony whereof I have signed my name to this specification.

JOHN W. COSGROVE.

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