US1977720A

US1977720A - Web delivery apparatus

Info

Publication number: US1977720A
Application number: US687593A
Authority: US
Inventors: Fred D Fowler
Original assignee: Hood Rubber Co
Current assignee: Hood Rubber Co
Priority date: 1933-08-31
Filing date: 1933-08-31
Publication date: 1934-10-23
Anticipated expiration: 1951-10-23

Description

Oct. 23, 1934.

F. D. FOWLER WEB DELIVERY APPARATUS Filed Aug. 31,, 1933 Mm? J5EE .FZFUM/EE 7 wz-ud jbetween the oonvolutions of fabric.

Patented Oct. 23, 1934 v UNITED STATES.

WEB DELIVERY APPARATUS Fred D. Fowler, Newton, Mass., assignor to Hood Rubber Company, Inc., Watertown, Mass, a corporation of Delaware Application August 31, 1933, Serial No. 687,593

3 Claims. (Cl. 242-75) This invention relates to devices for delivering a web of sheet material to machines for performing operations upon the same and is especially useful in unwinding and delivering unvulcanized rubberized fabric or similar material.

In the manufacture of rubber articles it is often necessary to perform operations such as cutting, coating, and the like upon a web of rubberized sheet material such as frictioned fabric and to deliver said material to the machinesadapted to perform the operations without slack and under substantially uniform tension. Such fabrics or other webs are usually wound upon mandrels with a non-adhesive liner wound When the fabric is unrolled the varying adhesion of the fabric to the liner and the gradually decreasing radius of the roll causes variation in the force required to unwind it. Where it becomes necessary to supply unwound fabric at a substantially uniform low tension it is advisable to provide separate means for unwinding and delivering the fabric.

The principal objects of the present invention are to provide delivery of a web from a roll thereof at substantially uniform tension, and automatically to compensate for undue variations in the tension of the delivered Web.

Other subjects will appear from the following description and the accompanying drawing.

In the drawing:

Fig. 1 is a perspective view of the device showing a web of fabric, portions of the device and the web being broken away.

Fig. 2 is an end View of certain details showing the tension regulating device as applied to the web, parts being omitted and parts broken away.

Referring to the drawing, the roll of fabric interwound with a liner is designated by the numeral 10, and is loosely mounted on a bar 11 rotatably supported in checks 12 on a suitable stationary frame 13. The frame also rotatably supports on chocks 14 (one only being shown) a bar 15 on which a shell 16 for receiving the liner 17 is mounted.

The end of the liner from roll 10 is started around shell 16, and the web 18 passed thereover to drive the liner windupv at the proper velocity.

The pulling mechanism comprises a roll 19 fixed to a shaft 20 rotatably supported in a pair of brackets 21 (only one being shown) mounted on the frame 13. A flanged pulley 22 is fixed to shaft 20. A motor 23 mounted on the floor below pulley 22 is provided with a pulley 24. Pulley 2,4 drives pulley 22 through a loosely mounted slip belt 25. The arrangement is such that the belt 25 normally Will slip on the pulley 24 and will advance the web only when the force required to unwind the web is not excessive and/or the pull on the outgoing web resulting from increase in the velocity of the machine performing the succeeding operation is not excessive.

To compensate for abnormally high tension resulting from excessive speed of the succeeding machine or excessive resistance of the web to unwinding from the roll, as where the stock is tacky, mechanism is provided as follows:

A lever 26 has one end pivoted on shaft 20 and at its lower end carries a pulley 2'7 journaled on a stud 28. A roll 29 is mounted on a shaft 30 having one end journaled in the lever 26 and the other end journaled in the lower end of a link (not shown) which has its upper end journaled on shaft 20 at the opposite end of the machine, the arrangement being such that roll 29 may be moved orbitally about roll 19 by increase of tension in the web.

A gear 31 fixed to roll 29 engages a gear 32 fixed to shaft 20. The pulley 27 normally is suspended near the slack reach of the belt 25 and is held in such position by a spring 33. Should the lever 26 swing in the direction of travel of the web the pulley carried thereby will press against the belt and tighten the same.

The roll 29 preferably is provided with a helical ridge 32, the helix being the right-handed on one end of the roll and left-handed on the other to spread the fabric and smooth out wrinkles.

A guide roll 33 is supported from the frame 13 by bearings 34 and serves to maintain a uniform arc of contact of the fabric around the roll 19 regardless of the diameter of the liner 1? built upon the drum 16.

The operation of the device is as follows: The end of the liner having been started on the roll 16 and the web of fabric passed thereover, the fabric is threaded under roll 33, over roll 19 and under roll 29 from which it passes to the machine performing the succeeding operation. The motor 23, through the slip belt 25, drives the device to cause the fabric to be unwound from roll 10.

When, due to increase in adhesion in the roll and/or excessive speed of the succeeding machine, the tension in the web increases, the forces tending to straighten the web where it passes around

rolls

19 and 29 causes the arm 26 to swing the pulley 2'7 into engagement With belt lob 25 against the force of the springs 33, thereby decreasing slippage of the belt and increasing the speed of the web.

I claim:

1. Apparatus for unwinding and delivering a web from a roll thereof, said apparatus comprising a pair of rolls about which theweb, istrained in a reversely curved path, at least one of said rolls being bodily movable by a movement of translation when acted upon by the tension forces in the web, means for frictionally driving said rolls, and means actuated by movement of the bodily movable roll under increased tension in the web for increasing the velocity or said rolls.

2. Apparatus for unwinding and delivering a web from a roll thereof, said apparatus comprising a pair of rolls about which the web is trained in a reversably curved path, one of said rolls being on a fixed axis, the other roll being orbitally movable with respect thereto when acted upon by tension forces in the web, a slip-belt for driving said rolls, and a belt-tightener actuated by movement of the movable roll to tighten the belt.

3. Apparatus for unwinding and delivering a web from a roll thereof, said apparatus comprising a pair of rolls about which the web is trained in a reversely curved path, one of the card rolls being on a fixed axis, the other roll being movable perpendicular to its axis, means for normally holding the rolls in one relation, a lever actuated by the movable roll, means includ ing a slip belt for driving said rolls, and an idler pulley carried by said lever and adapted when said lever is moved against said holding means under increased tension of the web to engage the belt and thereby increase the velocity of the 1 rolls.

FRED D. FOWLER.