US2929353A

US2929353A - Adhesive applying apparatus

Info

Publication number: US2929353A
Application number: US697395A
Authority: US
Inventors: George F C Burke
Original assignee: United Shoe Machinery Corp
Current assignee: United Shoe Machinery Corp
Priority date: 1957-11-19
Filing date: 1957-11-19
Publication date: 1960-03-22
Anticipated expiration: 1977-03-22

Description

March 22, 1960 5. F. c. BURKE 2,929,353

ADHESIVE APPLYING APPARATUS Filed Nov. 19, 1957 4 Sheets-Sheet l in van for George F C. Burke By his Attorney March 22, 1960 G. F. c. BURKE 2,929,353

ADHESIVE APPLYING APPARATUS Filed Nov. 19, 1957 4 Sheets-Sheet 2 mam a I l I I I l March 22, 1960 e. F. c. BURKE 2,929,353 ADHESIVE APPLYING APPARATUS Filed Nov. 19, 1957 4 $heets-$heet s March 22, 1960 G. F. c. BURKE ADHESIVE APPLYING APPARATUS 4 Sheets-Sheet 4 Filed Nov. 19, 1957 l ADHESIVE APPLYING APPARATUS Application November 19, 1957, Serial No.697g395 4 Claims. (Cl. 118 600) This invention relates to novel apparatus for applying adhesive to one of the marginal portions of a traveling web and is herein illustrated as applied to amachine of well-known type forforming a web of paper-orthelihe into a tube for subsequent use in the manufacture-of bags. It is to be understood, however, that the novel apparatus of this invention is not necessarily limited to use in a machine of this particular type or to the exact mechanical construction shown. I

In machines of the type herein illustrated the web of .paper, as it is drawn through the machine by feeding andspressing rolls, is folded over upon itself :toforma tube, and just before the folded-over Web enters the-pressing and feeding rolls a band of adhesive is applied along "themarginal edge of the lowermost run by adhesive apparatus mounted on the machine and including a nozzie adapted 'to engage the lowermost run of the web. Int he operation of machines of this type it frequently becomes necessary for the operator to rethread the leading edge of the folded-over web into the'feeding arid pressing rolls at the beginning of the tube forming operation or during such operation in which the web has been accidentally broken. When this occurs, the adhesive-applying apparatus, and particularly its nozzle, is very much in the way of the operator. During the rethreading o'peration the pressing and feeding rolls are, of course, first stopped so that the leading edge of the web may be introduced thereinto, and after this has been done the operator will want to jog the machine a few times by starting and stopping the pressing and feeding rolls in order to see if the web has beenproperly threaded and the machine otherwise ready to be put again into operation. If, as is frequently thecase, the adhesive applying device is drivenfrom the drive shaft of the machine, adhesive will be extruded through the nozzle during the ljogging of the machine and before the Web has been properly and completely rethreaded. I'hisfurtherham- :pers theo'perator in rethreading the web and/or in making'any other adjustments in the machine before the tube V forming operation is again initiated.

The principal object of this invention is to provide a novel and improved adhesive applyingapparatus for use in a machine of the type here in question whereby the above difficulties are completely overcome. To this end, and in accordance with features of the invention, the herein illustrated apparatus, which comprises a device for dispensing adhesive, including a nozzleand means for extruding adhesive through the nozzle, is supported on a ---member extending transverselyof the tube forming machine and over a traveling web therein, and this member --is pivoted at one end for movement in a direction to displace the adhesive dispensing device from an operative position to an inoperative position and is releasably secured at its other end against 'snchpi'votal movement. More particularly, a counterweight is'arranged' to effect the mentioned'pivotal m'ovem'entbfthe adhesive device supportingmember upon therelea'seof'a manually oper. "able latch, and meansare provided 'forautoinatically "dis- $29,353 Patented Mar. 22, 1960 .2 eng'aging-aclutchopei'ativelyconnecting theadhestveyextrujdmg'means to the power operated means of the ma- 6111116, inresponse to pivotal movement of the supporting r'nerriber-to displace the adhesive dispensing device 'to its nope'rative position, thereby discontinuing the flow er adhesive through the nozzle. I

The above and other objects and features'of the in vention will appearin the follo'wing detailed description of the preferred -embodiment thereof which is illustrated'in the a'ccompanying drawings, and will be pointed butin' the claims.

In the drawings,

Fig l is a 'view in'perspec'tive showing' 'themove l apparatus of this invention as applied to a well-"known'type of 'tube fo'rming machine;

':'Fig-. :2 1's a view in side elevation and at 'anenlar'ge'd scal'e of-the-n'ovel apparatus showing members provided for supporting the apparatus on the machine;

-.Fi'g. 3 is a 'view in side elevation of an adhesive' m'elting and feeding device forming part of the apparatus;

. Fig.- 4iis a view in perspective of a portion of theadhesivemelting and feeding device;

FigLJ lS a view in vertical'section substantially on line -V-V- 0f Fig. '3 and looking in the direction of the arrows;

"Fig; 6 is' a plan view of 'a portionof' theadhesive melting and feeding device;

Fig. 7 is a view in endelevationof that portion of the "adhesive melting and feedin'g device whichis shown-in Fig. 6;-and

Fig. 8-is a view at anenl'argedscaleand iin'vertical -sectionsubstantially on line VIIIVI II of Fig. '6-atid looking in the direction of the'ar'row.

Referring to Fig. 1, 'the'inov'el apparatus of the-present inventionis therein illustrated :as associated with a'tub'e forming machine of well-known construction'andhaving a machine frame indicated generally by the "reference character 10 on which :there are supported pressing and feeding rolls 12,14 driven 'by mechanism not shown but including a power driven shaft 16. As is usual in rmachines of this type, the herein illustrated machine has vario'us guide members indicated by

reference characters

18, 20, 22 and 24 for causing a Web of pap'erW to be formed into a tube having overlapped portions'which are pressed together by the pressing'and feeding-rolls in a manner that will be readily understood by persons skilled in the art of paper bag manufacture. Just before the overlapped portions of the web reach the-pressing and feeding rolls a band ofuadhesive is applied to the underneatht portion of the web by means of a nozzle 'member 30 which is formed asa part of the adhesive melting: and

applying device of the present invention.

Securedto and extending upwardly from -the frame 10 of the tube forming machine are two arms-40, 42, 'Figs. ;.1 and 2, and pivotally supported on the arm 42 by means of a stud 43 is a cro'ssbar44on which an adhesivemelting'and feeding device comprising a body portion Sit-is adjustably'mounted by means 'of'a guideway 52, formed in a cover member 54 associated with the aforementioned body'portion, and a clamping screw 56 adapted to hold -the body portion in any selectedjposition of'adju's'tment along the crossbar. =Carried by-a shaft58 and rotatably mounted within a generally circularrecess: 60, formed-"in the body portion 50, is a-rnelting and feeding disk 62. Also formed in the body. portion 50 is an inlet passage 64 and an outlet chamber 66. Securedto the body portion Strand having a passage 70 formed therein -and -in alinement with the-inlet passage 64 is a guideiblock 72,

"and mounted on the body portion is a bracket member 74 on whichis supported feed mechanisminciuding afeed wheel 76 arranged :to be driven from the shaft 58 by mounted on the machine frame. the melting and feeding device and also of the arm 120 I are regulated so as to control the temperature of the 11 molten adhesive, as it is extruded through the nozzle 30, by means of suitable thermostats, not shown.

means of a sprocket 78, chain 80, and sprocket 82, and s presser wheel 84 arranged to be held yieldingly against a rod of adhesive R by means of a compression spring 86, the

wheels

76 and 84 extending into engagement with the adhesive rod through

suitable openings

88, 90 formed in a guide bushing 92 also carried by the bracket 74.

Arranged within the outlet chamber 66 are the two

gears

94, 96 of a gear pump adapted to pump molten adhesive, delivered by the disk 62 into the right-hand side of the chamber 66, Fig. 3, to the left-hand side of this chamber and thence into a transverse passage 98 formed partly in the body portion 50 and partly in the cover 54, Fig. 5. On the right-hand side of the gears 94,

96, as viewed in Fig. 5, this passage is in communication with a downwardly extending discharge passage 100, while on the left-hand side of these gears this passage is in communication with a by-pass passage, indicated generally by the reference character 102 and leading back to the right-hand side of the chamber 66, and two interconnected

needle valves

104, 106 are provided for varying the amounts of molten adhesive which are delivered, respectively, into the discharge passage 100 and returned through the by-pass passage 102.

Mounted on

conical bearings

110, 112, supported, respectively, by the body portion 50 and. a bracket member 114 carried thereby, is a block 116 to which there is secured an L-shaped arm indicated generally by the reference character 120. Formed in the arm 120 is a pas- .sageway 122 which communicates, at its lower end, with

discharge passages

124, 124 provided in the nozzle 30, formed integrally with this end of the arm, Fig. 8. At its upper end the passageway 122 is in communication with a bore 126, formed in the block 116, which is in alinement with a bore 128 formed in the body portion 50 and intersecting the aforementioned discharge passage 100, Fig. 5. As will be seen in Fig. 8, the discharge passages 124 of the nozzle open into a recess 130, formed in the operating face of the nozzle and adapted to apply a band of molten adhesive B to the lowermost run of the web W when the adhesive applying apparatus and nozzle 30 are in the operative positions in which they appear in Fig. 1. Because of the angularly offset arrangement of the lower portion of the arm 120 relatively to the pivotal' axis provided by the

conical bearings

110, 112, see Fig. 6, the nozzle 30 will be held in engagement with the web W by the action of gravity. A handle 132 is mounted on the block 116 so that the operator of the tube forming machine may lift the nozzle away from the web when desired.

'various portions of the adhesive melting and feeding device and also in the arm 120 are a number of electrical heating units H, H which are connected to a source of electrical energy through a switch and control box B also The temperatures of For driving the shaft 58 to rotate the melting and feeding disk 62, to drive the

pump gears

94, 96 through suit- ,able drive gears-150, 152, Fig. 3, and to drive the feed :whcel 76, through chain 80, ajaw clutch comprising two

elements

154, 156 is provided. The element 154 is fast on the right-hand end of the shaft 58, Fig. 2, while the element 156 is fast on one end of a spline shaft 158. The

other end of the shaft 158 is slidably supported on match- ,ing splines formed in the left-hand end of a hollow drive shaft-160 which is rotatably mounted in suitable bearings .formed in

upstanding portions

162, 164, of the crossbar .A coil spring 166 within the hollow shaft 160 tends to urge the jaw clutch member 156 yieldingly into engagement with the jaw clutch member 154 thus to connect the shaft 58 to the

shafts

158 and 160. The shaft is driven continuously, during the operation of the tube forming machine, from the aforementioned driven shaft 16, by means of

sprockets

170, 172 and a chain 174, Fig. 1.

For moving the clutch member 156 to the right as viewed in Fig. 1, against the action of the spring 166, thereby to discontinue the drive to the shaft 58 and stop the flow of adhesive through the nozzle 30, a clutch shifting arm is pivotally mounted on the bar 44 by means of a stud 182, and this arm, which has an operating handle 184, is connected to the clutch member 156 by means of a clutch yoke 186, Fig. 2.

As explained above, the crossbar 44 is pivotally supported at one end on the upstanding arm 42 by means of a stud 43. The other end of the crossbar is supported on the other upstanding arm 40, see Fig. 2, and in order to hold the crossbar 44 and the adhesive melting and feeding apparatus in the operative positions shown, against the action of a counterweight suspended from an extending end portion 192 of the crossbar by means of a link 194, a manually releasable latch member, indicated generally by the reference character 196, is provided. This latch member is pivotally mounted on the left-hand end of the crossbar 44 on a pin 198 and has a hooked portion 200 which is adapted to be held in latching relation to an offset shoulder portion 202 on the arm 40 by means of a compression spring 204, interposed between an operating arm 206 of the latch member and the bar 44. As will be apparent, the operator, merely by striking the arm 206, can easily release the latch and free the bar 44, together with parts carried thereby, for elevation to the inoperative position indicated in broken lines in Fig. l of the drawings, by the action of the counterweight 190 and as determined by the engagement of the extending portion 192 with an abutment surface 208 on the arm 42.

When the crossbar 44, together with the adhesive melting and feeding apparatus carried thereby, are thus elevated to inoperative position, the shaft 58 is automatically disconnected from the shaft 160 in the following manner. Connected to the arm 180 is one end of a rod 210 the other end of which is slidably received within a hollow sleeve-like member 212 which is pivotally connected to a laterally extending portion 214 of the arm 42, Fig. 2, by means of a pin 216. The rod 210 carries a pin 218 which is held in engagement with the left-hand end of a slot 220, formed in the member 212, by means of a compression spring 222, when the parts are in the position shown in Fig. 2. As will be apparent, due to the offset relation of the stud 43 and pin 216, when the bar 44 is swung upwardly, as above explained, the rod 210 and the sleeve-like member 212 act as a rigid link which swings the arm 180 in a clockwise direction thereby shifting the clutch member 156 to the right and disconnecting the shaft 58 from the

shafts

158 and 160. When the bar 44 is in the latched-down position in which it is shown in Fig. 2, the arm 180 may also be swung in a clockwise direction by the operator against the resistance of the spring 222 and by means of the handle 184. For holding the arm in a position to disconnect the shaft 58 from the shaft 158, a latch member 230, mounted on the rod 210, is adapted to engage a notch 232 formed in the sleeve-like member 212.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. Apparatus for applying adhesive to the marginal portion of a traveling web in a machine having a frame, web feeding instrumentalities and power operating means, said apparatus comprising a device for dispensing adhesive including an adhesive applying nozzle and means for extruding adhesive through the nozzle, and a clutch for operatively connecting said extruding means to the 7 power operating means of the machine, a member for supporting said device extending transversely of the machine, above the traveling web, and pivotally mounted at one endson a support associated with the frame of the machine, a second support associated with the frame of the machine for receiving the other end of the supporting member to locate the adhesive dispensing device inoperative position, means tending to effect pivotal movement of the supporting member in a direction to displace the adhesive dispensing device from its operative position to an inoperative position in which said device is swung upwardly and away from the traveling web, means for releasably securing said other end of the supporting member to said second support, and means for automatically disengaging said clutch in response to pivotal movement of the supporting member to displace the adhesive dispensing device to inoperative position.

2. Apparatus for applying adhesive to the marginal portion of a traveling web in a machine having a frame, web feeding instrumentalities and power operating means, said apparatus comprising a device for dispensing adhesive including an adhesive applying nozzle and means for extruding adhesive through the nozzle, and a clutch for operatively connecting said extruding means to the power operating means of the machine, a member for supporting said device extending transversely of the machine above the traveling web and pivotally mounted at one end on a support associated with the frame of the machine, a second support associated with the frame of the machine for receiving the other end of the supporting member to locate the adhesive dispensing device in operative position, means tending to eifect pivotal movement of the supporting member in a direction to displace the adhesive dispensing device from its operative position to an inoperative position in which said device is swung upwardly and away from the traveling web, a manually operable latch for releasably securing said other end of the supporting member to said second support, and means for automatically disengaging said clutch in response to pivotal movement of the supporting member to displace the adhesive dispensing device to inoperative position.

3. Apparatus for applying adhesive to the marginal portion of a traveling web in a machine having a frame, web feeding instrumentalities and power operating means, said apparatus comprising a device for dispensing adhesive including an adhesive applying nozzle and means for extruding adhesive through the nozzle, and a clutch for operatively connecting said extruding means to the power operating means of the machine, a member for supporting said device extending transversely of the machine above the traveling web and pivotally mounted at one end on a support associated with the frame of the machine, a second support associated with the frame of the machine for receiving the other end of the support ing member to locate the adhesive dispensing device in operative position, a counterweight connected to said supporting member tending to effect pivotal movement of the supporting member in a direction to displace the adhesive dispensing device from its operative position to an inoperative position in which said device is swung upwardly and away from the travelng web, means for releasably securing said other end of the supporting member to said second support, and means for auto matically disengaging said clutch in response to pivotal movement of the supporting member to displace the adhesive dispensing device to inoperative position.

4. Apparatus for applying adhesive to the marginal portion of a traveling web in a machine having a frame, web feeding instrumentalities and power operating means, said apparatus comprising a device for dispensing adhesive including an adhesive applying nozzle and means for extruding adhesive through the nozzle, and a clutch for operatively connecting said extruding means to the power operating means of the machine, a member for supporting said device extending transversely of the machine above the traveling web and pivotally mounted at one end on a support associated with the frame of the machine, a second support associated with the frame of the machine for receiving the other end of the supporting member to locate the adhesive dispensing device in operative position, a counterweight connected to said supporting member tending to effect pivotal movement of the supporting member in a direction to displace the adhesive dispensing device from its operative position to an inoperative position in which said device is swung upwardly and away from the traveling web a manually operable latch for releasably securing said other end of the supporting member to said second support, and means for automatically disengaging said clutch in response to pivotal movement of the supporting member to displace the adhesive dispensing device to inoperative position.

References Cited in the file of this patent UNITED STATES PATENTS