US2192414A - Pressure roller - Google Patents

Description

March 5, 1940. c. E. REED PRESSURE ROLLER Filed March 10, 1937 @ar/es affid PatentedMar. 5,1940 i I 2,192,414

UNITED STATES PATENT OFFICE I a r 2,192,414 a i PRESSURE ROLLER I Charles E. Reed, Chicago, Ill. Application March 10, 1937, Serial No. 130,183

8 Claims. (01. 271-51) My invention relatesto the printing and feed- Referring to the pressure roller l3, it is seen ing rollers in rotary printing presses, and more that each terminal portion of its shaft l5 proparticularly to the rollers associated therewith jects into a bushing 16 seated in a bearing",

7 and commonly called pressure rollers, the functhe latter being extended lengthwise under the 5 tion of these being to hold the 'web or sheet roller in the, form of a carrier l8. This carrier 5 in proper contact forprinting or feeding puris intended to be vertically movable relative to poses. v v a cross-bar l9 similarly positioned under the One object of my invention is to provide a same'and secured endwise to the sides 10 of the pressure roller which is independently adjustpress, whereby to be in a stationary position.

10' able at either end. 1- Fig. 3 shows the under side of the end of the car- 10 A further object of the invention is to provide rier IB slightly recessed at lBa to receive the a pressure roller which is adaptable to both upper end of an expansive spring 20 carried by minor and major variations in the surface of the a pin 2| which seats on one end portion of the printing cylinder or feed roller, whereby to be cross-bar IS. A screw reduction 21a of the pin adjustable to operate in co-Qrdination with such 2| threads through the set portion to receive a variations. i I lock-nut 22 and a terminal head 2lb. Thus, by,

Another object of the invention is to provide a means of the adjusting screw'the tension of the double adjustment at each end of the pressure spring may be varied to impart the proper roller, whereby to maintain the same against the degree of pressureto the roller I3 in the direc- 20 worksheet with the proper pressure and retain tion of the web, in order that the proper con- 20 the roller from advancing beyond the proper tact may be had by the same for the feeding or limit. printing operation. r

An additional object of the invention is to de- Accessory to the pressure device just described si n th novel p ss roller along s ple and is an adjustable control featuringa vertical in I 26 Pra c es, w e y 0 b inexpensive to p 23 whose upper end is screwed into the roller 25 d a d adaptable t y p t pr ss. With carrier l8 indicated at 23a, the pin depending the above objects in view, and any others which freely through a bore [9a. in the cross-bar l9 I may u st t selv s f m t d s r pt n to and issuing from the latter in threaded form to f ow, a b e understanding t e nve t receive a washer 24 and a hand nut 25. Beyond may be had by referring to the accompanyin the latter the pin receives an expansive spring 30 drawing, in which? 26 before it terminates with a washer 31 and a- 1 is an elevation fliigfilellt'offar D n polygonal head 231). It is seen that by means of ins pr s, showi the installation of e novel the hand nut 25 the upward pressure of the p ssureroller; nd I roller l3 may be controlled to limit the rise of 35 2 isa plan w the roller to a required height, the spring 26 35 Fi 3 is a section on line in g-. serving to check the nut 25 from rotating freely Partly in a i I i from vibration. This adjustment is important Referring specifically, to the drawmg, when it is considered that the printing cylinder fices 9 1 present purposes that the s1des of or feed roller may have inequalities or low areas 40 the print ng press are represented at H], th t ne or the other end, and the pressure roller 40 havmg bearmgs for the mquntmg of is therefore withheld from advancing beyond feed roller 12. Beneath the latterhis she .nogel properpoint in respect to such areas pressure roller web or 5 15 m .When the press is not in use, the pressure cated by finely-dotted lines at M, and it may be i roller I3 is preferably; kept spaced from the units assumed that the roller l2 1s driven to feed the above it in Order that no difficulty may be had web [4 with the frictional assistance of the pres in threading theweb or paper Sheet through the sure roller I3. Similarly, a large unit such as zone of p g The n gelement at each l' r m be substituted for the a a pnntmg cy mde ay end of the roller is a hook 21 which acts as a feed roller I2 and designed to print from a form on its urfac upon the web 4 and t t yoke upon an end pin lBb of the roller carrier 0 pressure roller 3 maintaining t tt in I 8. The hooks 2'! occur next outside the s1des l0 r t t t theprinting cylinder, si c of the press and are mounted on a rock shaft 28 the function of the pressure roller is the same l'ournaled in the same. At one end the rock in either case, its description in relation to the shaft carries a lever 29. Thus, the latter may feed roller I2 will be a sumcient representation. be swung to the left from the position indicated 55

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