US1479278A - Form-roll trip mechanism - Google Patents

Description

Jan. 1, `1924 J. R. BLAINE FORM ROLL TRIP MECHANISM Filed March 2s. 1921 s sheets-sheet 1 rllllllxl llllllUllllllllll J. R. BLAINE FORM ROLL TRIP MEGHANISM Jan. l, 1924 3 Sheets-Sheet 2 Filed March 28 1921 J. R. BLAINE FORM ROLL TRIP MECHANISM Filed March 28 1921 3 Sheets-Sheet 3 Qn Q Patented Jan. 1,1924.

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JOSEPH R. BLAINE, or CHICAGO, ILLINOIS, AssIGNon To MIEHLE PRINTING Panes a MANUFACTURING Co., or CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS;

` FORM-ROLL' TRIP MECHANISM.

Applicationy filed March 28, 1921. y Serial No. 456,260.

To all who-m z't may concern:

Be it known that 1, JOSEPH R. BLAINE, a citizen of the United States, residing at Chicago, in the county of Cook and State of illinois,` have invented certain new and useful Mechanism, of which t-he following is a specification. -V

This invention relates to form roll trip H., mechanism, and is an improvement of the f elevation of said trip mechanism; and,

Figure 3 isa fragmentary side elevation showing the various rolls associated with the form cylinder in their cooper-atitve positions.

In view of the fact that many parts of this form roll trip mechanism are disclosed. in my said copending application, only suchl parts which form the present invention will be specifically described, some of the other parts being referred to only in a general way.

As is well understood in the art, inkmg rolls are tripped to prevent toomuch ink being supplied to the plate cylinder when no sheets are fed through the press, or, in other words, the inking rolls are tripped` under certain conditions to maintain a uniform supply of inkon 'the plate cylinder. Furthermore, it is necessary, rin order to prevent bad marking or uneven inking, to have the rolls tripped on and -off at the gap in the cylinder, and in this particular case the rolls are tripped on and off sequentially because the rolls cover a space larger than the gap. With the present mechanism, as also with the mechanism in my copending application,

the inking rolls are tripped on and off, fully automatically, and also optionally by hand.

Referring to the figures of the drawings, it will be noted that have showna form Improvements' in Form-Roll Trip' cylinder 10, cooperating with which are two sets 11 of inkingrolls, each including three inking rolls 12 rrwhich under normal printing conditions engage the plate cylinder for distributing ink thereon. FourpivotallyV mounted frame members 13v are'provided, two at each end ofthe rollers, and accord ingly only two are shown in the figures of the drawings. pivotally mounted, as at 14, and Vhas projecting portions 15, 16 and 17 engaged byVv portions of the inking vrolls 12, the last two projections in each case being more pronounced.Y The inking rolls normally reist upon the plate cylinder 10, but just'clear the projections of the plate members 13, and accordingly, if theplate members 13 are caused to rise and fallY about their pivotal. points 14, the inking rolls likewise will rise out of engagement or fall into engagement with respect to the plate cylinder 10.

To control the rise and fall of the rolls, Il have provided the frame members 13 with cam slots 18, which are traversed by projections 19in each case carried'at the end of one arm 20 of a bell crank lever pivoted'jat 21, the other arm of the bell crank lever be-y ing in the form of a toothed segment 22, which meshes with the teeth 23 of a composite rack trip bar 24, the teeth on the opposite side of the bar 24 being in mesh with a segment 25 forming part of a bell crank lever 26 ypivotally mounted at 27 and having another arm 28. From the `arrangement thus far vdescibed, it is apparent that if the rack trip bars 24 are forced downwardly, the segments 22 will be rocked downwardly and the projections 19 of arms 20 will be forced downwardly in the cam slots, which are eccentrically arranaged with Each of the frame members isV respect to the Vpivotal centers 21 of the bell crank levers, causing the frame members 13 to swing upwardly about their pivotal centers 14 for raising the inking rolls and disengaging the latter fromthe form cylinder 10. Likewise, when the trip bars 24 are permitted to spring back into normal position as a resultof energy stored in return springs 29, the arm Vprojections 19 will move Yupwardly in the eccentric cam slots 18 to permit the inking rolls 12 to move back into engagement with the form cylinder 10.v As stated hereinabove, in view of the fact that the inking rolls 12 cover a space wider than the gap, thesevrolls 'ijn sets are raised and lowered in a given sequence, the action being entirely automatic, as disclosed in my said copeuding application.

For` manually raising and lowering the inking rolls l2, a lever 26 is pivotally oonnected by a link 30 to one arm 8l of a control lever 'pivoted at 33. The lever 2G on the oppositely arranged lever 28 is pivotally connected by a link 34 to vanother arm 35 of said lever 32 having a handle portion 36.

In the figures of the drawings the inlring rolls l2 are in engagement with the forni cylinder 10, and, as shown in dotted lines in Figure 2, the inking rolls are tripped out of engagement With said form cylinder. This tripping action may be automatic, yor manual, as hereinabove described. By means of this simple and improved form roll trip mechanism, including the frame members "ha-ving eccentricallv formed cam slots, the

efciency and operation of the trip mechamsm is made more commercial.

It is my intention to cover all modifications of the invention 4falling Within the spirit and scope oi' the following claim.

I claim:

In combination, a form' cylinder, ajpair of sets of inking rollerscooperating there-V with, a pair ofsets of frame members, each of said sets of frame members including two frame members mounted at the ends of said rollers, each of said frame members having projectiong members engaging portions of said rollers, said frame members having cam f slots, arms for operating said frame members, said arms being provided with projeetions adapted to .ride iny said cam slots,

and rack trip bars for operating said arms,

said bars having means for manually operating same.

Signed at Chicago, Illinois, this 25thk day of March, 1921. a

JOSEPH a. Brains.

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