US1949419A - Apparatus for applying an adhesive surface to a web - Google Patents

Description

March 6, 1934. J. A. JOHNSON 1,

APPARATUS FOR APPLYING AN ADHESIVE SURFACE TO A WEB Filed Aug. 29, 1929 Q 3 Sheets-Sheet l INVENTOR APPARATUS FOR APPLYING AN ADHESIVE SURFACE TO A WEB March 6, 1934.

J. A. JOHNSON Filed Aug. 29; 1929 3 Sheets-Sheet 2 lN\ /ENTOR John/ Johnson BY & I flu, Y

March 6, 1934. Y J. A. JOHNSON APPARATUS FOR APPLYING AN ADHESIVE SURFACE TO A WEB Filed Aug. 29, 1929 3 Sheets-Sheet 3 INVENTOR J 0/11? flJo/vnso/i BY 0 ATTORNE Patented Mar. 6, 1934 PATENT QFFICE V APPARATUS FOR APPLYING AN ADHESIVE SURFACE TO A WEB John A. Johnson, Brooklyn, N.=Y.

- Application August 29, 1929, Serial No. 389,120

6 Claims. (Cl. 154-37) This invention relates to a method of and apparatus for applying an adhesive surface to a web to produce a composite web one surface of which is adhesive and the other surface non-adhesive. While the composite web is applicable for various uses it is particularly adapted to serve as an impervious lining material for the sealing pads for receptacle closures, usually a disk of cork or cork composition inserted in crown closures for receptacles. The web to the surface of which the adhesive material is applied comprises a suitdie, it is assembled with the adhesive surface in able material, such as metallic foil or paper, from which disks are cut so that the adhesive will be coextensive with one surface of the disk and assembled in the crown closures with the adhesive surface contiguous to the sealing pads in the closures and applied thereto under heat and pressure, which is preferably effected by heating the sealing pad in the crown closure and as a disk is cut from the web, as by-a. punch and contact with the heated sealing pad and thereby rendered sufficiently viscous to adhere to said pad after which the disk assembled on the pad is subjected to an elevated temperature and pressure to effect a further fusion of the adhesive and intimate contact between the disk and pad when it is placed under pressure during the cooling period, as disclosed in my co-pending application Serial No. 409,793, which has matured in Patent No. 1,852,578, issued April 5, 1932.

It is the object of the invention to provide an improved method of and apparatus for applying the adhesive material to a surface of a lining web, such as a metallic foil or paper, said adhesive material being normally non-viscous under ordinary atmospheric temperature and adapted to be rendered viscous when subjected to an elevated temperature, and has the property of being flexible and maintain a firm contact between the lining and sealing pad, insoluble in and impervious to moisture or water and resistant to acids and alkalies which may be present in liquids in receptacles to which the closuresv are applied, gutta percha or a gutta percha compound having been found to have the characteristics to meet" plied to a surface thereof, the web of lining material in its passage to the take-up reel being fed and guided over and in contiguous relation to a heating element to heat said web, means being provided to maintain the heating element at a predetermined temperature. The adhesive web is fed and guided into juxtaposed relation to the web of lining material on the heating element to render it viscous and cause it to adhere to the web of lining material, and the juxtaposed webs, or composite web, guided to the take-up reel and in its passage to the take-up reel subjected to pressure to cause the adhesive material to firmly adhere to the web of lining material and intimately unite therewith during the period ofcooling and congealing of the adhesive material. The take-up reel is rotated continuously and by the rotation thereof the web of the lining material and adhesive webs are drawn from the respective rolls of said webs, and means are provided to connect the take-up reel with and disconnect it from a drive shaft connected with a source of power whereby to render said reel active and inactive. Means are also provided and actuated from the means to connect the take-up 0 reelwith and disconnect it from the drive shaft to adjust the guiding means for the adhesive web when the reel is disconnected from the drive shaft to position the adhesive web out of juxtaposition relative to the web of lining material g5 contiguous to the heating means therefor to prevent fusing of the adhesive web, and to adjust said guiding means when the reel is connected with the drive shaft to position the adhesive web in juxtaposed relation to the web of lining ma terial contiguous to the heating means.

In the drawings accompanying and forming a part of this application Figure 1 is a side ele vationof apparatus for carrying out the method and showing the parts in normal operative position.

Figure'2 is a side elevation of the guiding means for the adhesive web and showing the same adjusted to position the adhesive web away from the web of lining material contiguous to the heating means when the reelis disconnected from the drive shaft.

Figure 3 is a plan view of the apparatus looking at the top of Figure 1. v

Figure 4 is a detail view in end elevation, part- 1y broken away, to show the driving connection between the reel and the drive shaft.

to the web of material.

Figure 6 is a cross sectional view of the juxtaposed adhesive and metallic foil or paper webs.

Figure 7 is a sectional detail view taken on the line 7'7 of Figure 8 looking in the direction of the arrows, and showing the method of guiding the web of lining material, heating means and the adhesive web in juxtaposed relation to the web of lining material on the heating means.

Figure 8 is a cross sectional view taken on the line of Figure 1 looking in the direction of the arrows to show the arrangement of the heating means.

Figure 9 is a sectional view taken on the line 9-9 of Figure 1 looking in the direction of the arrows to show the arrangement of the take-up reel and the connection thereof with the drive shaft."

Figure 10 is a detail view taken on the line 1010 of Figure 1 looking in the direction of the arrows to show the means for connecting the drive shaft with and disconnecting it from a source of power; and v Figure 11 is a perspective view of shifter means for shifting a belt from a loose to a fast pulley, and vice versa on the drive shaft to render the reel active and inactive, and also showing the means actuated from said shifter to adjust the guiding means for the adhesive web to juxtapose said web relative to the web of lining material on the heating means and out of said position.

The embodiment of the invention illustrated for carrying out the method comprises a bed B upon which the operative mechanism is mounted, which bed is supported by standards S. A

roll 12 of the web T of impervious material, in

the present'instance metallic foil, and wound upon a perforated core is rotatably mounted by engaging the, roll core upon a stud 13- fixed in and extending laterally from the bed with flanges or spiders 14 mounted on the stud at opposite ends of the web roll. A roll 14' of the adhesive web A, also wound upon a perforated core, is rotatably mounted by engaging the roll core upon a stud 15 fixed in and extending laterally from a bracketlfi fixed upon the bed B, with flanges or spiders 17 mounted upon the stud at opposite sides of said web roll. The adhesive web may comprise caoutchoue or rubber, or a composition of rubber and a suitable gum, the adhesive being such that it is normally non-viscous under ordinary atmospheric temperatures, but is adapted to be rendered viscous when subjected to an elevated temperature and having the characteristics of being moisture or water proof and a resistant to acids and alkalies. The adhesive web is juxtaposed to the metallic foil in a zone having an elevated temperature and the juxtaposed webs or composite web C isguided to a take-up reel and in its passage to the take-up reel is subjected to pressure, the take-up reel being positively driven and drawing the adhesive and metallic foil webs from the rolls thereof. The take-up reel (Figure 9) comprises a disk 18 to constitute a side flange of the reel, fixed upon a shaft 19 rotatably mounted in the bed, a perforated core 20 upon which the composite web is wound being engaged upon the shaft contiguous to the disk 18 and operatively connected with the shaft to rotate therewith by a pin fixed in and'extending laterally from the disk slidably engaging a perforation in the core 20, as at 21.

A disk 22, similar to the disk 18 and constituting the other flange of the reel, is releasably secured upon the shaft 19 by a screw. 23 threaded into the hub of thesald disk to impinge against the shaft 19 at the outer, end of the core 20. By this arrangement when the desired quantity of the composite web is wound or rolled upon the core 20 the roll of web with the core may be readily S0 removed by releasing the securing screw 23 on the disk 22 and sliding said disk with the web roll and core from the shaft 19, when another core and the disk 22 are engaged upon the shaft. The reel is positively driven by a gear 24 fixed on the end of the shaft 19 projecting from the side of the bed opposite to the reel, said gear being enclosed in a housing 25 removably mounted on the side of the bed and in which the shaft 19 is also rotatably supported. The gear meshes with a pinion 26 fixed to a drive shaft 27 rotatably. supported in the gear enclosing housing 25, the shaft being rotated from a suitable source of power (not shown) by a belt 28 passing around a pulley 29 fixed to the shaft, and the shaft and thereby the reel rendered inoperative by shifting the belt to a pulley 30 loose on the drive shaft 27.

Means are provided-to produce a zone of heated or elevated temperature to render the adhesive web or one surface thereof viscous, this zone being arranged at a point where the adhesive web is juxtaposed to the metallic foil web. For this purpose there is provided a drum, comprising a disk portion 31 (Figure 8) having a laterally extending annular flange 32 at the periphery, and said flange arranged at the opposite ends with annular and radially extending guide flanges 33. The drum is rotatably mounted on a shaft 34 fixed in and extending laterally from the bed B. To heat the drum there is provided an electric heating element of annular form 35 and comprising a coil of electric resistance wire imbedded in a material which is a non-conductor of electricity but having the. properties of high thermal conductivity, diatomaceous earth being suitable for said purpose. Or the resistance wire may be imbedded in a body of material having high thermal conductivity and having the propertiesbf a non-conductor of electricity and adapted to be rendered incandescent and radiate heat therefrom by the passage of an electric current through the conductor imbedded therein. The material commonly termed "alundum grains intimately united in compact form while in a plastic state by a cementatious material, such as a colloidal material or clay has been found efflcient for the purpose. While it is not absolutely essential the heating element is preferably enclosed in a metallic sheathing. This heating element is mounted upon an annular flange 36 extended laterally from a disk member 3'7 fixed upon the shaft 34.in abutting relation'to the end of the flange 32 of disk 31 and co-operates therewith to provide an enclosed housing, the disk flange 36 being arranged to position .the heating element in opposed and preferably slightly spaced relation to the disk flange 32, although it may be in contiguous relation thereto.

The heating drum is arranged on the bed at a higher level than the support for the roll 12 and in interposed relation to the roll 12 and the takeup reel. The metallic foil web T is guided under tension over the drum flange 32 between the guide flanges 33 to the take-up reel, the drag of the reel on the web causing the drum to rotate 145 and the ready paying off of the web from the roll 12 prevents the breaking of the web by the strain of the pull of the reel thereon by passing the web from the roll 12 over aperipheral guide flanged roller 38 between the flanges, the roller 150 being rotatably supported on a stud 39 extending laterally from the bed at a higher level than the support for the roll 12. The web is guided from the roller 38 in a downward direction under another peripheral guide flanged roller 40 similar to roller 38, rotatably supported on a stud 41 extending laterally from the bed at substantially the same level on which the heating drum shaft 34 extends. From the roller 40 the web passes over the drum flange 32 and is heated by the elevated temperature created by the heating element within the drum.

To juxtapose the adhesive web A to the metallic foil web T and render the contiguous surface of the adhesive web viscous to cause it to adhere to the metallic foil web the adhesive is juxtaposed-to the metallic foil web upon the heated drum. For this purpose the adhesive web is guided from the roll 14' over a roller 42 rotatably supported on a'stud fixed on a horizontal axis to a support 43 carried by an ear portion 46 projecting at a right angle from adjacent one end of a lever 47 pivotally mounted adjacent the opposite end by' a headed stud 48 engaging a perforation in the lever 47 and secured in the bed. The end of the lever 47 supporting the roller 42 extends over the heating drum, as clearly shown in Figures 1, 2, 3 and 7-and is arranged with a roller 44 rotatably mounted on a stud fixed in and extending laterally from the said end of the lever 47, the end of the roller carrying stud 45 being extended beyond the roller and in the form of a hand grip to move the lever toward and away from the drum to facilitate the treading of the adhesive web about the roller 44 relative to the metallic foil web T on the heating drum. The lever 47 normally moves by gravity in a direction toward the drum, said movement being regulated by a stop adjustably carried by the lever engaging with the top of the bed B, said stop being in the form of a' screw 49 threaded into an opening in the ear 46 and secured in adjusted position by lock nuts threaded on the screw. The guide roller 44is so positioned that the adhesive web as it passes about said roller is juxtaposed in contiguous relation to the metallic foil web on the drum. "As the webs are juxtaposed the composite web is guided from the heating drumover a peripherally flanged guide wheel 50 between the flanges, the wheel being rotatably supported on a stud 51 fixed to the side of the bed and extending laterally therefrom below the axis of the shaft 34. The web is guided from the wheel 50 in a downward direction under a peripherally flanged guide wheel 67 similar to the wheel 50 rotatably mounted on a stud 68 fixed to the bed and extending laterally therefrom in a plane below the axis of the stud 51, and the composite web is further guided from wheel 67 in an upward direction over a peripherally flanged guide roller, 69 between said-flanges, the roller 69 being rotatably supported on a stud 70 extending laterally from the side of the bed and in a plane higher than the axis of the shafts 34 and 19. The composite web is directed from the roller 69 onto the take-up reel core 20. The wheels 50. 67 and roller 69 are mounted intermediate the drum and take-up reel. The passing of the composite web C in an interwoven manner about the wheels 50, 67 and roller 69, imparts pressure thereto to assure an intimate contact between the webs T and A resulting in an inseparably and intimate- 1y united composite web. The normal position of said lever 47 is as shown in Figures. 1 and 7 to guide the adhesive web and juxtapose it to the metallic foil web. Should the feeding of the webs be stopped and the adhesive web remain in contact with the metallic foil web on the heating drum the material of the adhesive web would bev fused necessitating a rethreading and piecing of the composite web, and to obviate this and also facilitate the threading of the web relative to the guiding means the lever is adapted to be adjusted away from the heating drum, which may be effected by grasping the hand grip of the roller supporting pin 45, shown in Figure 8.

The take-up reel is rendered active and inactive by shifting the belt 28 to the pulley fixed to the driving shaft, or to the pulley loose on said shaft, which is effected by means, of a shifter in the form of a yoke shaped member 52 (Figures 1, 3, 10 and 11) fixed in a rod 53 slidably mounted in a boss of the bed, as at 54, Figures 3 and 10, the shifter rod being provided with a manipulating hand grip 55 and the movement of the shifter rod limited by pins 56, Figures 10 and 11. To simultaneously move the lever 47 arranged with the web guiding means from the Figure 1 to the Figure 2 position when the reel is'rendere'd inactive by the shifting of the operating belt from the fixed to the loose pulley, a lever 58 is pivotally 10 supported upon the bed intermediate the lever 47 and the belt shifter with the one end of lever 58 to extend over the end of lever 47 adjacent the mounting thereof and the levers arranged with co-operating portions, the other end of the lever 58 extending adjacent to the shifter rod 53 with said end of the lever flanged laterally at a right angle and carrying a roller, as at 59, (Figure 11) for engagement of a portion of an angular extension 57 of the shifter extended in the direction of the shifter and inclined relative to the axis of the shifter rod, whereby as the shifter is actuated to shift the belt to the loose pulley and render the take-up reel inactive the lever roller 59 will ride up the inclined extended portion of 1 5 the extension 57 raising said end of the lever 58 and depressing the end engaging with the lever 47 and thus moving the latter lever to the Figure 2 position. When the shifter is actuated to shift the belt to the fixed pulley and render the takeup reel active the lever roller 59 will move down the inclined portion of the extension 57 and the lever 47 will assume by gravity the position shown in Figure 1. b

To maintain the heating drum at a predetermined temperature thermostatically controlled electric switch mechanism is provided, the switch mechanism being designated in a general way at 60 connected with the source of current supply by a conductor 61 through a Junction box 62 to the lead in wire 63, and with a series of conductors 64 with a thermostat, designated in a general way by 65, mounted on the disk 37 of the heating drum in heat conductivity therewith, as shown at 67' in Figure 8, one terminal of the resistance member of the heating element being electrically connected in series with said conductors 64 and the other terminal connected by conductor 66 through the junction-box with the source of electricity. By'so producing the composite web of lining material there will be an even distribution and a tenacious adherence of the adhesive throughout the entire area of one surface of the metallic foil or paper web which will not be released from the disk as it is cut from the web, 5 and particularly the marginal portions thereof. Also by applying the adhesive in superposed relation to the metallic foil or paper web it may be readily inspected during the applying of the ad- Y hesive with the result that imperfections may be readily observed and such portions of the composite web discarded before it is used in the apparatus for cutting lining disks therefrom and the applying of the same to the sealing pads in crown closures.

While I have illustrated one embodiment of my invention it will be obvious that various modifications may be made in construction and arrangement of parts, and that portions of the invention may beused without others without departing from the scope of the invention.

Having thus described my invention I claim:

1. In apparatus for applying an adhesive to a surface of a web, means to rotatably support a roll of the web to which the adhesive is'to be applied and a roll of a web of adhesive material nonviscous under ordinary temperature and adapted to be rendered viscous by an elevated temperature, a positively driven take-up reel, a rotatable drum over which one web is guided to the takeup reel, means to heat said drum, means to guide the other web to said drum and juxtapose it to the first web guided over the drum. comprising a-pivoted lever with one end extending over the drum, and a roller carried at said end of the lever over which the web is guided, said lever being adapted to assume a position by gravity to juxtapose the web guided thereby onto the web guided over the drum and means to guide the juxtaposed webs from the drum to the take-up reel.

2. Apparatus for applying an adhesive to a surface of a web as claimed in claim 1, wherein the means to guide the one web and juxtapose it to the web guided over the drum is arranged with a second roller carried by the lever adjacent the end extending over the drum in elevated relation to the first roller to guide the web from the web roll to said first roller to prevent'breakage of the web. a

3. In apparatus for applying an adhesive to a surface of a web as claimed in claim 1, means to render the take-up reel active and inactive, and means operative when the take-up reel is rendered inactive to actuate the lever to move the lever and position the one web out of juxtaposed relation to the other web guided over the drum, and when the take-up reel is rendered active permit the lever to assume a position to juxtapose the one web relative to the other web on the drum.

4. Apparatus for applying an adhesive to a surface of a web as claimed in claim 1, wherein the means to guide the juxtaposed webs to the takeup reel comprises a series of rotatable members between which the juxtaposed webs are guided from the drum to the take-up reel under pressure and tension, means operative to connect the reel with and disconnect the same from a source of power to render the reel active and inactive, a. second lever actuated from the means to render the reel active and inactive and operative when the reel -is rendered inactive to move the first lever to position the web guided thereby out of juxtaposed relation to the web guided over the drum and when the reel is rendered active permit the first lever to assume the position to juxtapose the web guided thereby relative to the web guided over the drum.

5. In apparatus for applying an adhesive to a surface of a web, means to rotatably support a roll of the web to which the adhesive is to be applied and a roll of a web of adhesive material normally non-viscous under ordinary temperature and adapted to be rendered viscous by an elevated temperature, a take-up reel, a heating element interposed between the web rolls and reel over which the web to which the adhesive is to be applied is moved to heat the same, means to guide in a straight path and progressively juxtapose the adhesive web relative to the heated web beyond the heating element to render the adhesive web viscous and cause it to adhere to, the heated web, and means to subject the juxtaposed webs to pressure during the cooling of the heated web and guide the juxtaposed webs to the take-up reel.

4 6. In apparatus for applying an adhesive'to the surface of a web, means to rotatably support a rollsof the web to which the adhesive is to be applied and a roll of a web of adhesive material normally non-viscous under ordinary temperature and adapted to be rendered viscous by an 819:,

vated temperature, a positively rotated take-up reel, a rotatable drum, means to guide the webs to and juxtapose one web relative to the other on the drum to render the adhesive web viscous and cause it to adhere to the other web and guide the juxtaposed webs from the drum to the take-up reel, a drive shaft, means to connect the reel to and disconnect the same from said drive shaft to render the reel active and inactive, and means operative from the means to connect the reel with and disconnect it from the drive shaft operative when the reel is disconnected from said shaft to move the adhesive web guiding means to position the adhesive web away from the heated web, and operative when the reel is connected with the shaft to move said guiding means to juxtapose the adhesive web relative the heated web on the drum.

JOHN A. JOHNSON.

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