US1733716A - Inking apparatus of printing machines - Google Patents

Description

Oct. 29, 1929. 0, BLACK 1,733,716

INKING APPARATUS 0F PRINTING MACHINES Filgd Nov. 26, 1927 Patented Oct. 29, 1929 UNITED STATES HORACE DRUMMOND BLACK, OF LONDON, ENGLAIQ'IDQASSIGNOR TO THE BELLIPUITCH 8c PRINTING CO. LIMITED, 01? UXBBIDGE, MIDDLESEX, ENGLAND INKING APPARATUS 0F PRIN TING MACHINES Application filed November 26, 1927, Serial No. 235,857, and in Great Britain December 10, 1926.

This invention relates to improvements in the inking apparatus of printing machines such as combined ticket printing and issuing machines in which the process of distribution of the ink and the linking of the platen has of necessity to be in as simple a form as possible owing to lack of space.

The method employed in the ordinary form of printing machine of breaking up and distributing the ink through the medium of a number of composition rollers, some of which are provided with a lateral oscillating movement inorder to obtain the fine distribution necessary in the ordinary form of printing, isincapable of application to these machines owing to limitations of space.

The method employed of conveying the ink from the ink duct to the type face by means of one or more rollers has hitherto only yielded comparatively poor results and the object of my invention is to provide means for improving the inking effect obtained by the above means. To this end, according to the invention, I arrange the inking roller and the ink duct roller which are formed of or coated with the usual resilient composition and are of comparatively short length, in such a manner that they contact obliquely with one another, the effect of this oblique contact giving to the inking roller a somewhat similar distribution to that ob tained with the lateral oscillating rollerin the ordinary form of inking train.

i I am awarethat in a machine for manufacturing and printing cigarette tubes in which an intermediate roller is arranged between the ink duct roller and the distributing roller, it has been proposed to mount such intermediate roller on an axis at an angle to the printing cylinder 'axis which arrangement occupies more space than can conveniently be provided in printing machines of the type to which my invention is applied.

In a suitable arrangement for carrying out the invention, the inking roller is carried on a pivot beneath the fixed revolving ink duct roller,.the movement of the said inking roller being controlled by a cam, secured to the shaft of the platen or printing cylinder, androtating therewith, which op erates one end of a bell-crank lever, the free end of the inking roller shaft being carried in a slot provided inthe other end of. the said bell-crank lever. i I The method of operationiis as follows Normally, the inking roller is in oblique frictional, contact with the ink duct roller 7 and revolves therewith. The cam secured to the shaft of the printing cylinders bears against the end of the bell-crank lever during rotation and forces it downwards, thus drawing the inking roller, carried in the slot in the end thereof, into contact with the said printing cylinder. 1 This contact is maintained until the bearing surface ofthe cam is rotated out of contact with the said lever, when the lever is returned to its normal position by means of a spring. i I

In order that the invention may be fully understood, I will now describe it by reference to the accompanying drawings, in which c Figure 1 is a sectional elevation of one method of applying the inventiomand Figure 2 is a plan view thereof.

a is the inkduct roller, revolving on its spindle b, and c is the ink reservoir. d is the inking roller which revolves on the spin dle e, normally arranged obliquely to the spindle 6. One end of this spindle e is pivoted at f to the framing of the device and the other end thereof rides in a slot f of the framing.

g isthe printing cylinder carrying type tobe inked and which is mounted on thespindle h. j is the cam secured to the said spindle h and revolving therewith and 7c is the bells crank lever, in a slot Z in one end of which the free end of the spindle e engages, and which is pivoted at m and carries at its other end the roller it against which'the cam j bears to bring the inking roller cl into contact with the printing-cylinder g. p is the spring provide d for returning the said roller 61 to its normal position. 7

1 The operation of follows i I The roller cl is normally held by the spring the arrangement is as p in oblique frictionalcontact with the roller f a, as shown by the dotted lines in Figures 1 and 2. As the cylinder 9 rotates the cam j depresses the bell-crank lever is thereby swingingthe inking roller d on its pivot ,7 out of contact with the roller a and into contact with the printing cylinder 9 This contact is maintained until the bearing surface of the cam j is rotated out of contact With the said lever: is when the roller (Z is'automatically returned to its normal position by the spring It will beunderstood thatas the rolls a and (Z are formed of, or coated with. the usual resilient composition, and are of comparatively short length, surface contact over their entire length is ensured.

Claimsz:

1. An inking device for printing machines, comprising a printing cylinder, an ink duct roller and an inking roller, said rollers being so mounted Withrespect to one another that an oblique contact is obtained, and means for oscillating one, of said rollers to b ring the same out; of engagement with the other, andxinto parallelengagement with said cylinder; 1

2; In a ticket printing and issuingmachine, a: printing cylinder, an ink duct roller, an inking roller, mechanism synchronized with the rotation of said, printing cylinder for causing said inking roller to alternately'engagesaid inkw onct roller in: oblique contact, and: said printing cylinder inrpa'rallel con-- Y tact.

3. i-kllllllill'l'g' device for printing machines, comprising a printing cylinder: mounted on a; shaft, an ink duct roller and an inking rollerythe latter being mounted on a shaft pivoted: at one end, a bell; crank lever slotted at one: end to receive the tree endv of said pivoted shaft, and a cam mounted on; said. printing cylinder shaft and revolving therewith tonoperat-ing' the opposite end of said bell-crank lever, said rollers being so mounted with respect to-one' another that when said belliorank lever is in operation, the roller mounted on said?p1votedshaftwill be oscillatedand intermittently brought into oblique contact with the other roller.

HORACE DRUE MOND BLACIQ

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