US2205498A

US2205498A - Web supply mechanism

Info

Publication number: US2205498A
Application number: US159679A
Authority: US
Inventors: Schwarz Otto
Original assignee: R Hoe and Co Inc
Current assignee: R Hoe and Co Inc
Priority date: 1937-08-18
Filing date: 1937-08-18
Publication date: 1940-06-25
Anticipated expiration: 1957-06-25

Description

June 25, 1940. O SCHWARZ 2,205,498

WEB SUPPLY MECHANI SM Filed Aug. 18, 1937 3 Sheets-Sheet 1 IN VENT OR 0H0 Sclzwan.

A ORNEY June 25, 1940. 0. SCHWARZ 2,205,498

WEB SUPPLY MECHANISM Filed Aug. 18, 1957 3 Sh'eets-Sheet 2 EQZ.

INVENTOR i OLto' Schwarz BY 3 l 3 r 7 ATTORNEY June 25, 1940. o, SCHWARZ WEB SUPPLY MECHANISM Filed Aug. 18, 1957 3 Sheets-Sheet 3 IN VEN TOR Otto Schwarz.

BY ATTORNEY 0 illustrated Patented June 25, 1940 UNITED STATES WEB SUPPLY MECHANISM Otto Schwarz, New York, N. Y., assignor to R. Hoe & Co., Inc., New York, N. Y., a corporation of New York Application August 18,

21 Claims.

This invention relates to web supply mechanism for a printing or other machineoperating on a web drawn from a roll, and more particularly to improvements in means for joining the web of a replacement roll to the web of an expiring roll without stopping the machine. This invention especially contemplates the provision of an improved Web joining mechanism which is compact and particularly eflicient and serviceable m use.

One object of this invention is to provide an improved web joining mechanism including a supporting shaft having an offset portion adapted to be engaged and rocked by the replacement roll should the roll inadvertently be moved beyond its normal web joining position, to prevent possibly damaging interference of the roll with other parts of the mechanism.

Another object is to provide means to reduce vibration or fluttering of a web running past a replacement roll when the Web and roll are disposed in web pre-joining position.

Another object is to provide means to interconnect supporting arms, disposed, one at either end of an elongated web deflector, to insure equal vmovement of the arms and prevent possible twisting of the deflector supporting bar, whereby uniform engagement of the deflector across a web will be assured;

Another object is to provide improved means to retract the cutting knife of the webcutting means. i v

Still another object is to provide an improved cutting knife releasing means.

Still another object is to provide improved means to manually actuate a. web deflector to deflect a running web into engagement with a replacement roll.

A further object is to provide an improved web joining mechanism which is convenient to manipulate and control, eflicient in operation, comparatively inexpensive to manufacture, sturdy in structure, and positive in its action.

With the foregoing and other objects in View, which will appear as the description proceeds, the invention resides in the combination and arrangement of parts, and in the details of construction hereinafter described and claimed.

The preferred embodiment of the invention is in the accompanying drawings,

wherein: g

Figure 1 is a side elevational view'ofthe web supply mechanism embodying the features of this invention;

1937, Serial No. 159,679

Figure 2 is an enlarged side view of the web joining mechanism of this invention; v t

Figure 3 is a face view, of the mechanism shown in Figure 2 looking in the direction of arrow 3;

Figure 4 is a view of certain of the parts shown in Figure 2 in the position they assume when the web cutting knife is released;

Figure 5 is a top view of a part of the web cutting knife retracting means and looking in the direction of arrow 5 in Figure 2;

Figure 5A is another View of the parts shown in Figure 5 after the same have been relatively moved into another position; t

Figure 6 is a top view of the web cutting means looking in direction of arrow 6 in Figure 2;

Figure 7 is a continuation of Figure 6; and

Figure 8 is a view of the web deflector actuating means looking in the direction of the arrow 8 inFigurel. Y I I In the web supply mechanism shown in the drawings, a reel H is provided which has arms l'2 extending therefrom upon which web rolls l3, l4 and I5 may be rotatably supported in, accordance with the general practice. Means is generally provided in such mechanism to rotate the reel l l to position the replacement roll l3 into driving engagement with a belt drive l6" and in a web pre-joining position with respect to a web I! running from the expiring roll 15. Such a position of the reel II is shown in Figure 1. Reference is hereby made to Patent No."

2,155,430 and Patent No. 2,063,098 for a more complete description of the belt drive l6 and the reel rotating means.

Electrical control means is also provided to insure positive timing action of the various parts and herein such control means is shown diagrammatically in Figure 1. controls include a switch l8 operated from a cam l9. mounted to rotate with each of the web rolls, a solenoid 2| in circuit with the switch l8, and a manually operated switch 22. Closing of the switch 22 permits the closing of the circuit through the solenoid 2| by the cam operated switch I8 in timed relation with the rotation of the roll by the belt drive l5. v

The web joining mechanism of this invention is supported from a machine frame part 23 by brackets 24. ,The brackets 24 also support a web guiding roller 25, over which the web l-l runs as it enters the machine. For the purposes of Briefly, the electrical the description of this invention, the web joining mechanism may be considered as being the combination of two devices adapted to cooperatively operate to join the web' of the replacement roll replacement roll it.

I3 with the running web I? from the expiring roll l5. One of these devices hereinafter referred to as the web deflector is constituted by a brush or other web engaging member 26, which is mounted upon a bar 2? secured to and extending between

arms

23 and 29. The other device hereinafter referred to as the web cutting means is constituted by a knife 3| slidably mounted in a frame 32 secured to and extending between

arms

33 and 36.

The adjacent pairs of

arms

28, 33 and 29, 34'

are mounted upon

shafts

35 and 36 respectively which are respectively journaled one in each of the brackets 26. The

arms

33 and 34 are keyed or otherwise secured to the respective shaft ends 35 and 36, while the

arms

28 and 29 are freely rotatable respectively thereon. An offset shaft portion 3'1 is connected at each end to one of the

shaft ends

35 and 33 by

crank arms

38 and 39 respectively, whereby the shaft ends 35 and 36 will rotate in unison in the supporting brackets 24. From the above, it will be understood that the term offset shaft, as used herein is intended to define a shaft structure generally of crank formation having a portion eccentric to other portions of the shaft. The offset shaft portion 3! is preferably hollow to permit the disposition therein of a shaft it which extends therethrough and is journaled in the

arms

38 and 39. Pinions 43 are secured to the ends of the shaft ll. Each pinion 33 is in mesh with a rack 34 secured to the inner side face of each of the

deflector supporting arms

28 and 25!. A spring 45 is coiled about the shaft 3! and has one end secured thereto and the other end secured to the crank arm 38. The spring 35 is so arranged and tensioned as to con stantly'urge the shaft ll to rotate in the proper direction to movethe

arms

28 and 29 relatively to the offset shaft portion 3'? and away from the The connection so provided between the web deflector arms 28 and 29' also prevents thedeflector from twisting by insuring swinging movement of the arms in unison when they are moved in web deflecting direction to join the webs. tion 3'! is arranged to be disposed closely adjacent to the web l'lwhen it is disposed in web pre-joining position so as to be engaged by the web l'l should it vibrate or flutter as it runs from the frame 32 to the roller 25 and thereby steady the web and reduce such vibration or fluttering movement.

The web deflector device and the web cutting device are releasably joined together for swinging movement into the web pre-joining position shown from the inoperative position, as indicated by dotted lines in Figure 1, by a catch 46 secured to a shaft 41 carried by the knife supporting arm 33, and adapted to engage about a pin 43 secured to the deflector supporting arm 28 (see Figure 2) An arm 49 secured on the shaft 4'! is connected to the plunger 5! of the solenoid 2| by a link52 whereby energization of the solenoid 2| will rock the shaft with the catch 46 and will release it from the pin 48 permitting relative movement between the

deflector supporting arms

28, 29 and the

knife supporting arms

33, 34. A coiled spring 53 is arranged to constantly urge the catch 46' into its pin engaging position. Due to the engagement of pins 54 on the

arms

33 and 34 with stop pins 55 secured to the adjacent bracket 24, the knife supporting arms are limited in their swinging movement with the offset shaft portion 31 toward the replacement roll l3. The

arms

33 and 34 are held in their web pre-join position Preferably, the offset shaft por and against the stop pins 55 by a spring 56 attached to a pin 51 on the arm 33 and to a machine part at 58.

A handle 59 is provided by which the

arms

33 and 34 may be manually swung into operative or web pre-join position or into the inoperative position indicated by dotted lines in Figure l. A cable or the like BI is provided, which has one end secured to a pin 62, mounted on the deflector arm 28, and has its other end secured to an arm 63.

The arm 63 is loosely supported on a shaft fi l, 'journaled in a bracket 66, secured upon the machine frame 61. A spring 65 has one of its ends secured to a collar 64' which is adjustably secured to the shaft 64; It is coiled about the shaft and has its other end secured to the arm 63. A handle 60, also secured to the shaft 63, is adapted to'rotate the shaft 64 to tension the spring 65 so that when the catch 46 is released the deflector 26 will be moved by the spring 65 through the cable 6|, toward the replacement roll E3 to engage the web IT and deflect it against the roll. to join it to a previously adhesive coated end of the web thereon.

The handle 60 has a finger 97 extending therefrom toward the bracket 66 and which is adapted by an adjusting screw 98 positioned to engage a pin 99 on the bracket 66 to limit the downward movementof the handle 60. An arm l0! secured to the end of the shaft 64 adjacent the arm 63 is provided with an adjusting screw I02 adapted to engage the arm 63, when it is rotated on the shaft 64 bythe spring 65 to actuate the deflector 26, and limit the movement of the arm 63. By adjusting the screw I02 the effective tension of the spring 65 upon the deflector 26 may be delicately adjusted and controlled to avoid too great a pressure being imposed upon the web H as it is pressed against the roll I3. A earn 403 also secured upon the shaft 64 is adapted to engage the operating arm I04 of the switch 22 to close the circuit controlled thereby when the handle 50 is moved downwardly into the position shown in Figure 1, from the normal inoperative position indicated by dotted lines.

As shown in Figures 1 and 2, the offset shaft portion 31 is arranged to protrude slightly beyond the face of the deflector brush 26 and the edge of the knife holding frame 32, and be disposed nearer to the replacement roll l3 than either of them. This disposition of the shaft portion 31 insures that, should the reel I! be inadvertently rotated beyond its determined web joining position, the replacement roll l3 will'engage the shaft portion 31 and rock it, whereby the web deflecting and cutting mechanism will be simultaneously rocked and no damage will be possible, due to the engagement of the roll therewith.

The knife 3| is mounted in the frame 32 and guided inits sliding movements therein by a plu rality of cooperating studs 68 and inclined grooves 69, one of which is shown in Figure 6. The knife is retained in its retracted position by a pin ll protruding from an arm 12 securedto a shaft 13, one end of which is journaled in and extends outwardly from a side of the knife supporting arm 33, while the other end is journaled in a bracket HI, secured to the frame 32. The pin H is arranged to enter a hole 14 in the knife 3! and hold it against the action of a spring 15 (Figure 7) arranged to constantly urge the knife to slide in one direction in the frame 32. The spring 15 is secured at its ends to the knife 3| at 16, and to the frame 32 at H. The pin ll isremoved from the hole 14 by the rotation of the shaft 13 by an web end thereof.

arm 18 secured on the shaft 13. A spring 19 is coiled about the shaft and has its ends connected to the arm 33 and to the arm 18. The spring-19 is tensioned and arranged to constantly urge the pin into the hole 14.

The arm 18 has a link 8| pivoted thereto and which extends upwardly therefrom alongside of the knife supporting arm 33 being guidingly sup ported by a strap 82 secured to the side of the arm 33. The link BI is provided with a hook end 83 adapted to engage over a pin 84 secured in the end of an arm 85 extending from the hub of the catch 46, when a stop pin 86, extending from the adjacent side of the deflector supporting arm 28', is moved'away from link by movement of the arm 28 toward the replacement roll I3. A spring 81 is. arranged to constantly urge the link 8| in pin engaging position, being secured at 88 to the link 8|, and at 89 to the strap 82. Energization of the solenoid 2| at the next revolution of theroll l3 after it has been energized to release the catch 33, will cause the link 8|, the hook end of which is now engaging the pin 84, to swing the arm 13 and pull the pin 1| from the hole M, whereupon the knife 3| will be protracted from the frame 32-by the spring 15 and against the web running from the expiring roll l5, to sever it, as shown by dotted lines in Figures 2, 4 and 6. The means to retract the knife 3| into the frame 32, is constituted by an arm 9|, secured to a shaft 92 extending upwardly along the replacement roll side of the knife supporting arm 33. The arm 9| has a stud93 extending from its free end downwardly into a slot 99 (Fig. 6), in the knife 3|. Rotation of the shaft 92 in one direc-. tion will rock the arm 9| to slide the knife 3| into retracted position whereupon the pin 1| will snap into the hole M by action of the spring 19 thereon. The shaft 92 is rotated by an arm 94 (Fig. 5), which is secured to the shaft 92 and extends into and engages with, the cam shaped face of a recess 95 formed in the hub portion 96 of the adjacent bracket 24. The arm 95, being movable with the knife supporting arm 33, sides out of the recess 95 (Figure 5A), when the arm 33 is manually returned to its inoperative position, and in doing so the shaft 92, to which the arm 94 is secured, is rotated, moving the knife 3| to its retracted position within the frame 32. I

The above described web joining mechanism is adapted to be operated to insure an efficient web join without stopping the machine. This is accomplished by rotating the reel II to dispose a replacement roll !3 in a determined web prejoining position and in engagement with the belt drive Hi to be rotated thereby. The web deflecting and cutting mechanism is then lowered into its web pre-J'oin position as shown in Figures 1 and 2. The handle 69 is then actuated to close the switch 22 and to impose a pull upon the cable 6| and the web deflecting brush 26 through the spring 65. The cam i9, at the next revolution of the roll l3, actuates the switch |8 whereupon the solenoid 2| is energized to release-the catch 46. The web deflecting brush 29 immediately engages the web I? andpresses it against the roll l3 whereon it adheres to the adhesive covered The handle 69 is held down until after the next actuation of the cam l9 upon the switch l8, whereupon the solenoid 2| is again energized to actuate the link 8| and through it .remove the pin H from the hole 14 permitting pinion.

the replacement roll is fed into the machine.

The mechanism is then swung back intoits inoperative positionduring which movement the knife 3| is retracted, as above described, and set in position to be protracted when the mechanism is again'actuated' to effect a web join.

It will be understood that the invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and itistherefore desired that the present' embodiment be considered in all respects as illustrative and not restrictive, and it will be further understood that each and every novel feature and combination-present in or possessed by the web joining mechanism herein disclosed forms a part of the invention included in this application.

' What I claim is:

1. In a web supply mechanism adapted to change the feed of a web from an expiring roll to a replacement roll, a web deflector extending acrossthe replacement roll and adapted to press a web from the expiring roll thereagainst, a rotatable shaft supporting said web deflector and having an offset portion, and means carried byand having an offset portion arranged to be dis-.

change the feed of a web from an expiring roll to a replacement roll, ashaft having an. offset portion, a web deflector pivotally supported on said shaft and arranged below said offset portion of said shaft andextending lengthwise of the replacement roll, and a gear connection between the ends of said web deflector and supported by the offset shaft portion to insure equal swinging movement of the deflector ends.

5. In a web supply mechanism adapted to change the feed of a web from an expiring roll to a replacement roll, a shaft having an offset portion, a web; deflector constituted by a member extending across the face of the replacement roll and swingably supported on said shaft by spaced apart arms extending therefrom to beyond the offset portion of the shaft, and a mechanism supported by the'offset shaft portion to operably connect said spaced apart arms to insure equal swinging movement thereof.

6. In a web supply mechanism adapted to change the feed of a Web from an expiring roll to a replacement roll, a shaft having a depending oifset portion, a web deflector constituted by a member extendingacross the face of the replacement roll and supported on said shaft by spaced apart arms depending therefrom. beyond the offset portion, a second shaft extending through said'oifset shaft portion, a gear pinion on each end of said second'shaft, and a'gear rack on the adjacent deflector support arm in'mesh witheach 7. In a web joining mechanism adapted to join the web running from an expiring roll to the web of a replacement roll, a spring urged protractable web cutting member, an arm supporting said member, a stationary bracket to which said arm is pivoted, and mechanism actuated by the rocking movement of said arm to retract said member, said mechanism including a lever arm in engagement with said member, a lever arm in engagement with said bracket to be rocked thereby when said arm is rocked, and a connection between said lever arms whereby they are rocked simultaneously.

8. In a Web joining mechanism adapted to join the web running from an expiring roll to the web of a replacement roll, a spring urged protractable web cutting member, an arm supporting said member, a bracket to which said arm is pivoted, a lever arm inengagement with said member, a lever arm adapted to cooperate with said bracket to be rocked thereby upon rocking movement of said arm, and a shaft carried by said arm and to which said lever arms are connected.

9. In a web supply mechanism adapted to change the feed of a web from expiring roll to a replacement roll, a shaft having an offset portion extending across the face of the replacement roll, a pair of spaced apart arms swingably supported on said shaft, one outside each end of the offset shaft portion, and a web deflector supported by said arms and extending between the outer ends thereof beyond the offset shaft portion and across the face of the replacement roll.

10. In a web supply mechanism adapted to change the feed of a web from an expiring roll to a replacement roll, a shaft having an offset portion extending across the face of the replacement roll, a pair of spaced apart arms swingably supported on said shaft, one outside each end of offset shaft portion, and a web deflector supported by said arms and extending between the outer ends thereof beyond the offset shaft portion and across the face of the replacement roll, said offset shaft portion being disposed nearer to the replacement roll than is the web deflector.

11. In a web supply'mechanism adapted to change the feed of a web from an expiring roll to a replacement roll, a shaft having an offset portion extending across the face of the replacement roll, a pair of spaced apart arms swingably supported on said shaft, one outside each end of the offset shaft portion, a web deflector supported by said arms and extending between the outer ends thereof beyond the offset shaft portion and across the face of the replacement roll, and means carried by said offset shaft portion to operatively connect the arms supporting said deflector.

12. In a web supply mechanism adapted to change the feed of a web from an expiring roll to a replacement roll, a shaft having an offset portion extending across the face of the replacement roll, a pair of spaced apart arms swingably supported on said shaft, one outside each end of the offset shaft portion, a web deflector supported by said arms and extending between the outer ends thereof beyond the offset shaft portion and across the face of the replacement roll, a second pair of spaced apart arms supported by said shaft, one at each end thereof, and a web cutting knife holder supported by said second pair of arms and extending between the outer ends thereof beyond the offset shaft portion and across the face of said replacement roll.

13. In a web supply mechanism adapted to change the feed of a web from an expiring roll to a replacement roll, a shaft having an offset portion extending across the face of the replacement roll, a pair of spaced apart arms swingably supported on said shaft, one outside each end of the offset shaft portion, a web deflector supported by said arms and extending between the outer ends thereof beyond the offset shaft portion and across the face of the replacement roll, a second pair of spaced apart arms supported by said shaft, one at each end thereof, a web cutting knife holder supported by said second pair of arms and extending between the outer ends thereof beyond the offset shaft portion and across the face of said replacement roll, said offset shaft portion being disposed nearer to the replacement roll than is the web deflector and the cutting knife holder.

14. In a web supply mechanism adapted to change the feed of a web from an expiring roll to a replacement roll, a shaft having an offset portion extending across the face of the replacement roll, a pair of spaced apart arms swingably supported on said shaft, one outside each end of the offset shaft portion, a web deflector supported by said arms and. extending between the outer ends thereof beyond the offset shaft portion and across the face of the replacement roll, a second pair of spaced apart arms supported by said shaft, one at each end thereof, a web cutting knife holder supported by said second pair of arms and extending between the outer ends thereof beyond the offset shaft portion and across the face of said replacement roll, and means carried by said oflset shaft portion to operably connect the arms supporting the Web deflector.

15. In a web supply mechanism adapted to change the feed of a running web from an expiring roll to a replacement roll, a rotatable shaft having an offset portion extending across the running web, a guide roller over which the web runs as it leaves said mechanism, and a Web engaging member mounted on said shaft, said offset shaft portion being disposed between said roller and said web engaging member in close proximity to the running web to steady it as it runs between said member and said roller.

16. In a web supply mechanism adapted to change the feed of a running web from an expiring roll to a replacement roll, a swingably mounted first arm having a web deflector mounted thereon, a second arm swingably mounted on a shaft and operatively connected thereto by a spring coiled about said shaft, a handle to rotate said shaft and thereby swing said second arm by increasing the tension on said spring, and a member connecting said first and second arms.

17. In a web supply mechanism adapted to change the feed of a running web from an expiring roll to a replacement roll, a swingably mounted first arm having a web deflector mounted thereon, a second arm swingably mounted on a shaft and operatively connected thereto by a spring coiled about said shaft, a handle to rotate said shaft and thereby swing said second arm by increasing the tension on said spring, a member connecting said first and second arms, and an adjustable stopmember positioned by said handle as it rotates said shaft to limit the movement of said second arm by said spring.

18. In a web supply mechanism adapted to change the feed of a web from an expiring roll to a replacement roll, a member extending crosswise of the web and adapted to operate thereon,

an arm supporting each end of said member,

shaft portions'in axial alignment on which the arms are rotatably supported, a shaft having a gear on each end thereof and rotatably supported in bearings located equidistant from the axis of the shaft, portions, and a gear on each arm mesh- 7 ing with one of said gears, whereby the said arms are constrained to substantially identical angular movement and prevent twisting or distortion of said member.

19. In a web supply mechanism adapted to change the feed of a Web from an expiring roll to a replacement roll, a member extending crosswise of the web and adapted to operate thereon, an arm supporting each end of said member, shaft portions in axial alignment on which the arms are rotatably supported, a shaft having a gear on each end thereof, means to connect said gear shaft to said shaft portions for support thereby with its axis parallel to the axis of the shaft portions, and a gear member on each arm in mesh with one of said gears, whereby the arms are constrained to substantially identical angular movement to prevent twisting or distortion of the member. I I

20. In a web supply mechanism adapted to change the feed of a web from an expiring roll to a replacement roll, a member extending crosswise of the web and adapted to operate thereon, an arm supporting each end of said member, shaft portions in axial alignment on which said arms are rotatably supported, a shaft rotatably supportedin bearings equidistant from the axis of the shaft portions, and a driving connection between each of the shaft ends and one of said arms to insure that said arms rotate in unison.

21. In a web joining mechanism adapted to join a web running from an expiring roll to the end of a web of a replacement roll, a spring urged protractable web cutting member, an arm supporting the said member and movable from operative to inoperative position, a support to which the arm is pivoted, a cam face on the support, and a shaft movable with the said arm and connected to the web cutting member and having an operating member engaging the cam face to move the shaft and retract the cutting member when the arm is moved from operative to inoperative position.

' OTTO SCHIWARZ.