US1654214A

US1654214A - Apparatus for coating strip material

Info

Publication number: US1654214A
Application number: US3953A
Authority: US
Inventors: Benjamin A Evans
Original assignee: BF Goodrich Corp
Current assignee: Goodrich Corp
Priority date: 1925-01-22
Filing date: 1925-01-22
Publication date: 1927-12-27
Anticipated expiration: 1944-12-27

Description

Dec. 27, 1927. 1,654,214

B. A. EVANS APPARATUS FOR COATING STRIP MATERIAL Filed Jan.22, 1925 2 Sheets-Sheet 2 E I Hu 41 47 fizz/5x72275525? H mmp Patented Dec. 27, 1927.

PATENT OFFICE.

UNITED STATES BENJAMIN A. EVANS, OF AKRON, OHIO, ASSIGNOR TO. THE B. IE. GODDEICH COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

APPARATUS FOR COATING STRIP MATERIAL.

Application filed January 22, 1925. $erial No. 3,953.

This invention relates to methods and apparatus for applying rubber cement or the like to strip material suchas the fab ric strips used in overshoes of the hooklessfastener type as anchorages or stringers for respective series of jaw members, wherein the jaw members on the stringers of a palr are adapted to be iutcrcalated and engaged with each other in succession by the movement of a slide mounted upon the two stringers in common, and to be disengaged from each other successively by movement of the slide in the opposite direction.

To adapt the stringers to become firmly united during vulcanization with the flies of the over-shoe in which they are incorporated it is desirable that the stringers or fabric strips be thoroughly rubberized except along their adjacent edges, upon which the jaw members are mounted, and such rubberizing can best be done by an application of rubber cement after the jaw members and slide have been mounted thereon, the two stringers of the pair joined at their ends which are to be at the lower part of the assembly in the overshoe, and the two series of jaw members intercalated and engaged with each other by movement of the slide to the opposite end of the assembly. It is important that thecement be uniformly applied to all parts of the stringers which are to overlap or extend into the marginsof the flies of the shoe, without application of cement to the jaw members or the slide, and prior to my i11- vention, so far as I am aware, this was accomplished by placing a shield or stencil over the jaw members and slide and applying the cement to the exposed portions of the stringers by means of a brush, manipulated by hand.

My chief object is to provide an im proved machine and improved procedure adapted to save time and labor in applying rubber cement or the like to articles such as the stringers or anchorage strips described. Further objects are to avoid waste of the material a plied and to rovide for accurate and unlform applicatlon of the material, so as to obtain a better product.

f the accompanying drawings:

Fig. 1 is a front elevation of a machine embodying my invention in its preferred form, a cement tank constituting a part thereof being shown in section.

Fig. 2 is a fragmentary front elevation,

partly in section, of a pair of cementing rolls constituting parts of said machine.

Fig. 3 is a perspective view of scraper devices for preventing the rolls from carrying excessive amounts of cement, one of the rolls being shown in dot and dash lines, in its relation to said scraper devices.

Fig. 1 is a middle, vertical section of the machine, on line 4 t of Fig. 1. I

Fig. 5 is a horizontal section of the machine, on line 5-5 of Fig. 1.

Referring to the drawings, the machine comprises a cement tank provided with

legs

11, 11, and a cover 12 for preventing excessive evaporation of solvent from rubber cement 13 contained in the tank. Said cover is cut away to accommodate, with but little clearance, the cement-transferring portions of the machine. Resting upon the floor of the tank and adapted to be readily removed therefrom is a metal block 14, upon which are mounted two pairs of guide posts, 15, 15 and 16, 16, for the journal blocks, such as 17 17, of a pair of

cementing rolls

18, 19, the lower one of which, 19, has its lower portion extending into the cement 13, and is adapted, by turning of the rolls without worlr therein, to apply cement to the upper roll. For securing the guide-post assembly in upright position in the tank a bracket 16 is secured to one of the guide posts 16 and has a forked outer end ada ted to straddle the upper margin of a wall 0 the tank, one of the forks being provided with a thumb screw 16 adapted to be tightened against the said wall to clamp the bracket in lace.

1e journal blocks of the lower roll, 19, mounted between the guide posts, are supported by blocks, of which one is shown at 20, Fig. 4, mounted between the guide posts and resting upon the foundation block 14:, and the journal blocks of the upper roll, mounted between the guide posts, are urged downward, to provide yielding pressure between the rolls, by compression springs such as the one shown at 21, Fig. 4:, interposed between the respective journal blocks and a bridge plate 22 screwed to the tops of the four guide posts, said springs being mounted upon respective studs such as the one shown at 23, Fig. 4, projecting downward from said bridge plate.

Each of the cementing rolls is waisted or formed with a medial, circiunferential groove, 18 or 19, for the free passage of the aw members, 24, 24, and slide, 25, of the fastener assembly, 26, said jaw members constituting in effect a medial rib thereon, while the rolls circumferential zones adjacent said grooves are adapted yicldingly to embrace the stringers, 27. 27, of the fastener assembly, and feed the latter through the device while applying cement to both faces of the stringers. Said zones are knurled, preferably being formed with knurling elements of pyramidal form, as shown, clearly at 28, 28, Fig. 2, the points of said elements preferably lying slightly within the radial limits of the adjacent cylindrical faces of the roll. The knurling is adapted to carry a relatively large quantity of cement and at the same time to avoid slippage of the cement-lubricated fabric strips.

' Between each knurled zone and the medial groove each roll is preferably formed with a flange 29 having a narrow cylindrical surface 30 of larger diameter than that of the knurling, so that the flanges of each pair will bear against each other when the work is not in place between them, which results in the flange face 30 of the upper roll, which operates on the outer face of the fastener, being kept substantially free of cement. The said flanges are adapted to press more firmly upon the work than the knurled portions, and thus to serve as a sort of dam to prevent extrusion of cement from the knurled zones onto the jaw members 24 or the portions of the stringers immediately adja- -cent thereto.

The two rolls are adapted to be driven by a hand crank 31 secured upon the shaft of the lower roll and a pair of intermeshed

gears

32, 32 secured upon the shafts of the two rolls respectively. I

For guiding the fastener assembly 26 between the rolls, a table or bracket 33 is mounted upon a bridge structure 34 connecting one of the guide posts 15 with the opposite post 16, said bridge structure being secured to said posts by

brackets

35, 35, and the work guiding -bracket :33 is formed on its upper face with a longitudinal groove 36 to accommodate and guide to the rolls the jaw members 24 and slide 25 of the fastener assembly, and with a tongue portion 33 whose upper face is an extension of the floor of said groove, said tongue portion extending-between the cementing rolls, past the nip thereof, at the position of their

oncumferential grooves

18, 19".

' To prevent the fastener assembly from adhering to and thus following the upper roll, as it passes from the nip of the rolls, a

ard 3 7, in the form ofa curved bar, is secured to the bridge plate 22 and has a free end portion exten ing into the groove 18 of the upper roll, adjacent the nip, in position to dislodge the work from the upper roll. The tongue 33 of the guide 33 is adapted to prevent the work from following the lower roll downward from the nip.

The bridge structure 34 comprises a lower plate 38, secured to the adjacent guide posts by the brackets 35, and an upper plate 39 held spaced from said lower plate by a scraper 40 secured to the lower plate by screws'49. 40 (Fig. 4), said scraper extending into the groove 19 of the lower roll, to scrape cement from the walls and floor of said groove, and by a pair of

scrap ers

41, 41 secured to the lower plate by

screws

41, 41, 41 41 and extending radially inward along the end faces of the roll 19 to scrape cement from said end faces. The screws 41 extend through the upper plate 39 as well as the scrapers 41 and the lower plate 38, but the construction is such that the upper plate 39 and parts carried thereby may be conveniently removed for cleaning cement therefrom, by removing said screws 41 and

screws

42, 42 which are mounted only in the upper plate 39 and the scrapers 41, while the screws 41 hold said scrapers in place on the lower plate.

Secured on the upper plate 39 are two screw-apertured

blocks

43, 43 in each of which ismounted a thumb-screw 44 having its inner end swiveled in a flange 45 projecting upward from a scraper 46, each of the said scrapers being slidably mounted in a guide-way defined by the

plates

38 and 39 and the bases of the fixed

scrapers

40, 41, so that the scrapers 46 may be adjusted by said thumb-screws respectively to scrape excess cement from the knurled and cylindrical faces of the lower roll 19. The scraper assembly just described is adapted for ready disassembly of its parts for cleaning cement therefrom when they become fouled, so that the harmful effects of dried. cement upon their operation may be avoided.

For scraping excess cement from the upper roll, 18, and returning it to the tank 10, an L-shaped chute 47 is mounted upon a pair of

scrapers

48, 48 adapted to scrape the end faces of the said upper roll 18 and upon a scraper 49 adapted to scrape cement from the walls and floor of the medial groove 18 of said roll, said

scrapers

48 and 49 at their bases serving as spacers between the chute 47 and a lower plate 59 connecting the outer ends of a. pair of

brackets

51, 51, projecting from the

adjacent corner posts

15, 16. Slidably mounted in guide-ways defined by the chute 47 and the bases of the

scrapers

48, 48 are scrapers 52 adapted to scrape excess cementfrom the working faces of the roll 18, each of said scrapers having projecting downward therefrom a lug 53 in which is swiveled the end of a thumb-screw 54 screw-threaded through a lug 55 projecting downwardfrom the plate 50, for adjusting thescrapers 52 to determine the amount of cement to be carried to the work by the roll. The floor of the chute l? and also the several scrapers, fitting against the under face thereof, slope down ward and away from the roll, so that cement scraped from the roll will flow away lever being connected to the chute 4:7 by a pull spring 60.

in the operation of the device, the parts being mounted as described and the tank 10 being filled to a proper level with cement, the cementing rolls are first rotated without anyiwork between them, whereby the upper roll as well as the lower one is charged with cement, ll, fastener assembly 26 is ,then passed through the device, its margins being engaged by the surlaces oil the

rolls

18, 19, adjacent the grooves l8, l9, and receiving cement tl'ieretrom. The operation as described is repeated upon successive lastener assemblies, the rolls being driven without work between them belore each piece o'l work is led through, or at sufiiciently frequent intervals to lreep the upper roll sufliciently charged with cement. Excess cement from the rolls tlo'ws back into the tank 10, and the cover thereot, closely fitting about the cementing mechanism, keeps the cement in good condition by preventing exabove statement of objects.

Modifications are possible within the scope of the invention, and I do not wholly limit my claims to the specific construction or the exact procedure described.

I claim:

1. A device for applying a coating to an elongated, medially ribbed article, said device comprising two pairs of axially spaced-apart roller means adapted to engage the side margins only of the article and to feed the same past a coating position,

and means adapted to support the article and to guide it to the said roller means by engagement with its medial rib.

2. A device for applying a coating to an elongated, medially ribbed article, said device comprising two pairs-of axially spaced "the said supporting and guiding means.

3. A device for applying a coating to an elongated, medially ribbed article, said device comprising two pairs ot axially spaced-- apart roller means adapted to engage the side margins only of the article and to feed the same past a coating position, means adapted to support the article and to guide it to the said roller means by engagement with its medial rib, and means for applying coating material to the work-engaging faces of the said roller means =4. A. device for applying a coating to an elongated article, said device comprising two pairs of axially spaced-apart roller means adapted. to engage the side margins only of the article and to teed the same past a coating position, and means for applying coating material to the work-engaging faces of the said roller means, said faces compris ing smooth, circumterential zones adapted. to engage the article relatively close to its medial portion and. lrnurled, circumferential zones adapted to apply coating material to portions ot the article relatively remote from its medial portion.

5. .Z-l, device tor applying a coating to an elongated, medially ribbed article, said device comprising two pairs of axially spaced apart roller means adapted to engage the side margins only of the article to feed the same and apply coating material thereto, means for applying coating material to the work-engaging faces of said roller means, and a guiding and supporting member extending through the space between the two pairs of roller means, from one side of their nip to the other, said member being adapted to guide the article to the roller means by engagement with its medial rib and to separate the article from members of the roller means as it, emerges from the nip thereof.

6.A coating device comprising a roll formed with a roughened, circumferential, materialrcarrying zone and with a circumferential flange adjacent thereto, said flange being of greater diameter than the said roughened zone and adapted to act as a guard against lateral flow of coating material on the work from said roughened zone as the said roll rotates in contact with the Work. 1

7. A coating device comprising a pair'of rolls formed with opposed, circumferential, material-carrying zones and with mating, outstanding, circumferential zones of smooth, cylindrica surface, means yieldingly urging one of the said rolls toward the other, and means forapplying coating material to one of said rolls, the outstanding,

cylindrical zones of said rolls being adapted to bear against eachother when the device is empty of work, to maintain one of them substantially free of coating material when the rolls are turned to transfer coating maone roll to that of the other. 10

In witness whereof I have hereunto set my hand this 17th day of January, 1925.

BENJAMIN A. EVANS.