US1987329A

US1987329A - Web roll braking mechanism

Info

Publication number: US1987329A
Application number: US564520A
Authority: US
Inventors: Fankboner Harland
Original assignee: GOSS PRINTING PRESS CO Ltd
Current assignee: GOSS PRINTING PRESS Co; GOSS PRINTING PRESS CO Ltd
Priority date: 1931-09-23
Filing date: 1931-09-23
Publication date: 1935-01-08
Anticipated expiration: 1952-01-08

Description

Jan. '8, 1935. H. FANKBONER 1,987,329

WEB ROLL BRAKING MECHANISM Filed Sept. 25, 1931 Patented Jan. 8, 1935 PATENT ()FFICE WEB BRAK NG Harland Fankboner, Chicago, Ill., assignor to The .Goss Printing Press Company, Ghicago, 111., a

corporation of Illinois Ap l ation Se tem e 2 1931 Se a N 64 530 3 Claims.

trneh s r a gement c mb n t s ehs mhm emeht he e n s wn and de ri The accompanying drawing, referred to herein and himd l tm a P h x efis ust ates on mbodim nt o t tent on and toget e wi he de cri ti n se ves t ex la n the prin i le of the invention.

The si l fi e of th d aw i a sid e ere ion o t p e e t e erre and l u t t t e emb diment the n ent onhree ht hv nti n has hr it o t th plrov .sion f a v l an improved b aking m s enism controlling t e r tat on o e rol s and the tension of the web fed therefrom produce a more positive control of the tension of the web fed therefrom. gt urther object is the provision of a web roll braking mechanism in which one of the brake members, is positively.

moved. away from the other, so that the brakes may be completely released. Still another object is the provision of a braking mechanism controlled by the tension of the running web which permits wider variations in the braking pressure than the brake mechanisms now generally employed.

In the present embodiment of the invention, the web roll braking mechanism comprises a pair of pivotally mounted brake shoes coacting with a brake pulley on the roll shaft, and toggle mechanism for releasably connecting the brake shoes together at one end and for positively moving the brake shoes toward and from each other. The toggle mechanism is connected to a pilot roller moved by changes in tension of the web fed from the web roll. Means are also provided for releasing the toggle mechanism from one of the brake shoes so that new web rolls may be easily moved into place, and suitable means are provided for varying the normal tension created by the brake mechanism.

It will be understood that the foregoing general description and the following detailed description as well are exemplary and explanatory nrehtioh si t n t e her e her s c r of the invention but are not restricted thereon.v

Referring now in detail to the drawing show:v ing the present preferred and illustrative em: bhfl rheh o th nve t n, the web roll .1 is rotatahlr su po t usua u n s. o m umrtihe a ke s 2 proj ct n at rally from the side tram-e 3c o t e p inti p ess- Weh o l ha t 4 P e t f r so e ista be nd e i the b a ket and ha mounted th reo a brak hhlle B ake S oe 5 be in a nst the Pulley 5 a e moi a l mo nt d in brake arm 7, '7 vot y s hhrt d on a P n 8' pr ec es om one bracket 2 and below the level of the roll ha t e thereb fa lit ting t move en o new web rolls into web feeding position.

M ans a v P de o c rollin the p esur p th a s shoes ee ih -t t bra e u l n ac or a e w th h t n io f th Web t hlm h b .0 to he i ti g ress an th ra h e sh w a o v nt na r of pi t oller me ha ism h et 001111693941 wi th 1 me h m.- e mbs ee, th Pi olle 101s rotatably journalled in end blocks 11 which are slidable between the horizontal guides 12 in bracket 1- ex n in at ra l rom t e re s frames 3 at either end of theroller. Pilot roller 9 no m ll held in a ce tra os ion a a ns he tension o th u nin w b b mea s 9; springs 14, compressed between the slide blocks 11 and the brackets 13.

In passing through the press, the running web 9 passes over a guide roller 15, rotatably mounted at one side of the press frame 3 and then passes over guide rollers 16 rotatably mounted at the end of brackets 13, the web being looped around the pilot roller 10 between the guide roller 16. The ends of the pilot roller project beyond the slide blocks 11 and are received within the slots in the upper end of levers 17 which levers are securely fastened to a shaft 18 journalled in brackets 19 projecting from the press frame 3.

For operatively connecting the pilot roller to the brake mechanism, a link 21 is pivoted on a laterally projecting arm integral with one of the levers 17, and at its lower end, link 21 is provided with a yoke 22 in which is slidable a pivot block 23. A toggle lever 24 is pivotally mounted on bracket 2 by means of pivot 25, and one end of lever 24 is pivotally connected to pivot block 23 by pin 26, thereby transmitting movements of the pilot roller to the lever 24. A pair of

links

27 and 28 are pivoted to the lever 24 a short distance from the pin 25, and extend in opposite directions, link 28 being permanently pivoted to the outer end of brake arm 7, and lever 24, while link 27 is releasably pivoted to the outer end of the upper brake arm 7' and permanently pivoted to lever 24. For facilitating the release of link 2'7, its upper end is formed as a hook 29 which can be slipped over and held in engagement with the pin 30 at the outer end of brake arm '7. This connection between link 27 and brake arm 7' permits the arm to be easily released and laid back for the insertion of new web rolls between the brake arms, and at the same time permits the brake arm to be moved in either direction by the pilot roller.

Means are also provided for varying the normal tension of the web fed from the web roll, and for this purpose pivot block 23 is variably positionable within yoke 22. For this purpose, a hand screw 32 is threaded in the lower end of yoke 22 and projects inwardly into pivot block 23, within which its inner end is rotatably mounted and held against axial movement by collar 33." By turning the hand screw 32, block 23 can be variably positioned within its yoke 22, thereby changing the normal setting of the brake and the brake arms 7 and. 7' moves 'these arms exactly in accordance with the movements of the pilot roller, and any abnormal increase in the tension of the web will cause the arms to bemoved positively;

away from and entirely clear of the brake pulley, while a decrease in the tension of the web will cause the arms to be positively moved with increased pressure against the pulley. The pres-'- sure of the arms is thus rendered exactly pro-' portional to the movement of the pilot roller,

and a much wider variation in the braking force"; is possible than with the mechanisms heretofore generally employed. In most of these mechanisms, there is always a minimum pressure between the brake arms and the brake pulley which can never be released by the pilot roller, but this undesirable condition is completely avoided by the present invention.

The invention in its broader aspects is not limited to the specific mechanisms shown and described but departures may be made therefrom within the scope of the accompanying claims without departing from the principles of the invention and without sacrificing its chief advantages.

;What I claim is:

1. Web roll controlling mechanism including in combination a brake pulley mounted on a web roll shaft, a pair or brake shoes mounted on pivotedarms and coacting with said pulley to control rotation of the web roll, a pilot roller moved by changes in the tension of the web fed from the arms and lever for moving the brake arms toward and from each other.

2. Web roll controlling mechanism including in combination a pilot roller moved by changes in the web tension, a brake pulley mounted on a web roll shaft, a pair of brake shoes mounted on pivoted arms and c'oacting withsaid pulley to control'rotation of'the web roll, a lever pivotally mounted between the ends of the brake arms and connected to the pilot roller, links connecting the brake arms and lever for positively moving thebra'ke arms toward and from each other and means connecting said lever and pilot roller for moving said lever in accordance with changes in web tension.

3. Web roll controlling mechanism including in combination a pilot roller moved by changes in web tension, a brake pulley mounted on a web roll shaft, brake shoes cooperating with said pulley, a series of levers forming a closed figure on which said shoes are mounted, certain of said levers being movable to move the brake shoes relatively tosaid pulley, means for supporting said levers on both sides of said pulley and means connected with said pilot roller and moved thereby for moving said levers.

HARLAND FANKBONER.