US598107A - moody - Google Patents

Description

(No Model.) 2 Shets-Sheet 1.

J. H. MOODY. WEB CONTROLLING DEVICE FOR PRINTING MACHINES.

QIP%ENT U R ATTU RNEYS.

Patented Feb. 1, 1898.

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J. H. MOODY. WEB CONTROLLING DEVICE FOR PRINTING MACHINES. No. 598,107. Patented Feb. 1,1898.

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UNITED STATES- PATEN scion,

JOHN H. MOODY, OF CAMBRIDGE, MASSACHUSETTS, ASSIGNOR, BY DIRECT AND MESNE ASSIGNMENTS, TO ROBERT HOE, THEODORE H. MEAD, AND CHARLES W. CARPENTER, OE NEYV YORK, N. Y.

WEB-CONTROLLING DEVlCE FOR PRINTING-MACHINES.

, SPECIFICATION formingpart of Letters Patent No. 598,107, dated February 1, 1898.

' Application filed December 1, 1892. $erial No. 453,714. (No model.)

To all whom it may concern:

Be it known that I, JOHN H. MOODY, a citizen of the United States, residing at the city of Cambridge, county of Middlesex, and State of Massachusetts, have invented certain new and useful Improvements in WVeb Controlling Devices for Printing-Machines, fully described and represented in'the following specification and the accompanying draw- I0 ings, forming a part of the same.

This invent-ionrelates to the means for controliin g the movement of a web of paper while being fed into a printing -machine, which movement of the web varies considerably under different conditions. Thus when the blanket is changed, as is necessary in webmachines which run at high speed, the size of the impression-cylinder is constantly reducin g as the blanket wears and a consequent 2o variance in its driving speed results. Again, since the web must remain taut in order to remove wrinkles, it will be necessary when its quality is bad and its strength is limited to slightly drive it, and when it is moved from or brought into a state of rest it must be accelerated and retarded in order to prevent breakage or the paying out of an unused portion.

The invention consists in the provision of an expanding pulley and belt for controlling the unwinding movement of the web of paper, which pulley has hand-operated means for increasing and diminishing its circumferential extent, whereby its surface speed is so 3 5 changed as to cause its feeding action to be appropriately varied, which varying feeding action is preferably applied to the rolled web through an endless controllingbelt carried in a swinging frame and arranged to follow the decreasing-roll, thus causing said'belt to apply frictional contact resistance to retard, to move conccrtedly with the roll, or to drive it and thus increase its movement, from which results a complete control of the feeding movement of the paper web and a consequent smooth and even passage of the web to the 'printing mechanism suited not only to the high rate of speed during the printing operation, but a movement appropriate to the quality of the paper used and its changing speed during the starting and stopping operations, whereby are maintained both an even feed and suitable tension.

The practical illustrations of the improvements shown in the accompanying drawings represent, in Figure 1, a plan view of the feeding end of a printing-machine, said View being taken on the line cab of Fig. 2; in Fig. 2, a side elevation of the same; while Fig. 3 is a longitudinal sectional elevation, and Fig. 4.- an end elevation, of the expanding controllingpulley.

The feeding end of the machine illustrated shows the impression-cylinder I and type or form cylinder T of the primary printing mechanism of a web-perfecting printing-machine. The paper web W to be printed is in the form of a large roll R, that is mounted upon aspindle resting in bearings provided in bracketsthat extend from the side frames, and the web W is led overa guide-roller and entered between the cylinders I T, and thence passes onward through the machine.

The expanding controlling-pulley P has its shaft 17 mounted in journals provided in brackets 20 21, that project from a cross-bar united to the side frames, and normally it is geared through an intermediate 23 to the wheel 2% on the impression-cylinder I.

The motion of the pulley P is communicated to the paper roll R by means of an endless belt B, that runs around the controllingpulley P and around a pulley D, that is journaled in a frame consisting of side arms 15 16, tied together and pivoted to swing on the shaft of the pulley P, said frame being long enough to enable the belt 13 to rest upon the top of a large roll of paper R.

The controlling-pulley P is an expanding pulley, and while it'may be otherwise C0l1 structed the structure of it shown herein has been found to be practically effective and is therefore preferred. Its shell is divided into four segments 1 2 3 4:, each of which has inwardly-projecting lugs, as 5 6 7 8, provided with dovetailed grooves that embrace corresponding dovetailed projections 9 1O 11 12, provided on the sides of a central core G, that is splined on the shaft 17 of the pulley P.

The sets of lugs, as 5 6 7 8, and projections, as 9 10 ll 12, may be duplicated to any extent required to secure stability of theparts but two sets, as shown in Figs. 3-an'd 4.,wi11; ordinarily be found to be sufficient. Th'esef lugs and projections are tapered longitudinally, as shown, to an extent that will cause the segments 1 2 3 at to move radially andthus increase or decrease the circumferential extent of the pulley as said lugs and projections are moved longitudinally with respect, to each other. Their longitudinal movement, is accomplished by the structure shown by means of a sliding head 30, which is recipro-' cated through a groove31, into :which is en-v tered the semicircular clasp 32- of a running? nut 33, that is moved bymeans of a screwthreaded rod 34, rotated 'in either direction by a hand wheel or crank 35. Theparts are so related thatnormally-the adjustment of the pulley will-besuchth-at; the surface of the belt B, which runs' ov-er-it, will-correspond with the pitch-line of the drivi ing-wheel 22, and hence the normal surface speed of thebelt B will be the same afsthat, of the printing-cylinders. If, however, it is desired to cause the controlling-pulleyfP-to move at a greater speed, and *thus through; the belt B drive the roll Rat a corresponding speed, as during the starting operatiemwhen, fromthe accelerated movement of -the,;print ing-cylinderscaused in attaining their normal' high s'peed of travel, when undue strain= upon the web wouldbe occasion-ed the hand-l wheellis turned 1 to properly rotate the rod '34, thus moving the nu-t 33and th'lodgh the clasp 32 forcing the head 30 inward,thus-s1iding the lugs 56'7 8 11p the inclinedfaces of theg p'rojections'9 1 0 11 1'2 andcausing-the"se ments'1-2' 3 4 to move radially ou-tward, thnsE increasing the circumferential area of the pulley P to the desired extent and causing-its; surface speed to be appropriately increased; If, onthe-contrary, the web is runningto'og free, the controlling-pulley -may,by a'contrary movement of the parts,beappropriately reduced inits circumferential extent to properlycontrol theweb by imparting to it the frictional resistance of a slower motion. In; the case where from its constantlyi'growi lrgg smaller the rollR-greatly resists the unwind-3 ing operation, as wouldbe the case when itis; comparatively small, the c'ontrolling-pull'eyi may be appropriately expanded -to drive-the; roll and thus insure the smooth unwinding of the web. Thus bythe simple means of: this expanding pulley I am enabled to "so actuate the belt-controlling the unwinding movement of the web that during the main run of the paper it may move with a like surface speed, and thus only exert a resistant friction due to the incumbent weight of the belt B or even have that compensated for by being given a slightly-increased speed and may drive or retard, as is required, during the varying conditions of movement incident to the rapid printing of long lengths of paper -fed-to a machine from a large and compactlyformed roll.

It will be understood that the invention is not limited to the expanding pulley. of the 'specificjconstruc'tion shown, but that expanding pulleys of any suitable form adapted to be adjusted by hand while running may be used, and that "other modifications may be made in thecon str-uc'tion shownwi-thout dep'anti-ng from the invention.

Whatis-claimed is-- I i 1. Ina mechanism for contr-ollingthe movemen-tof an unwinding vrolledwelo while beingfed to a prin'ting mechanism, the combination withan expansiblev pulley, and an endless belt driven-thereby and located so as to act upon the web, of*ahand-operated means for adj usting the pulley while running, substantiall y as described.

Ina mechanism forcontrollin gthe move ment of an unwinding rolled web, the com- =binationof zan expansibl'e pulley, an endless .bel-t driventhereby and located so as to act -upon 'the web, a hand-Wheel, ls'creu rod roi 'tated thereby, a n-ut traveling on-said rodand 7001111661366. with the reciprocatingrpart ofsaid l pulley, whereby thepulley maybe contracted and expanded While 'rajpidly rotating, subs-tan-tially -as described.

Inamechanism for'controlling the movemBHlROf an unwinding rolled webwhile be- 'ingfedto'the--printin,g mechanism the combination with an expansible pulley, an :end- 'lessbelt driven thereby and'located so as to act upon the web, of gearing connectingthe :pulley-shaft with thatof one of-theprinting- *cylind ersandoperating to normally drive said pulley at the common running speed of a the ;vprinting-'cylinders, and "m eans, capable ofadj-ustment by hand for expanding and =contractin g said pulleyci rcumferen'tially to vary its surface speed substantiall y as de scri-loed. I 7

In testimonyxwhereof I have hereunto set ray-hand in thepresence of two subscribing "witnesses.

JOHN H. lVIO ODY.

Witnesses:

F. CRANE, E. LJSPEIR.

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