US1183623A - Ductor-mounting for printing-presses. - Google Patents

Description

J. R. BLAINE.

DUCTOR MOUNTING FOR PRINTING PRESSES.

APPLICATION FILED IULYB. 19 14.

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JOSEPH R. BLAINE, OF CHICAGO, ILLINOIS, ASSIGNOR T0 MIEHLE PRINTING PRESS & MANUFACTURING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

DUCTOR-MOUNTING- FOR PRINTING-PBESSES.

' Specification of Letters Patent.

Patented May is, rare.

Application filed July 6, 1914. Serial No. 849,118.

To all wfwm it may concern:

Be known that I, 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 Improvements in Ductor-Mountings for Printing-Presses, of which the following is a specification.

The invention has for its object certain improvements in the mounting of ductor rolls whereby is secured uniformity of yielding pressure contact between the ductor roll and ink fountain roll on the one hand and the form or distributing rolls on the other. To this end I provide a connection between the ductor roll and its operating member in the form of a yielding abutment'for each side of the a'rm, the two abutment members cooperating and compensating in such manner as to secure uniformity of resistance to yielding in either direction.

In order that the invention may be read- .ily understood in its general application I hereinafter describe one embodiment of the same, having reference to the accompanying drawing in which is set forth for illustrative purposes only a diagrammatic representation of a ductor mounted according to the invention in operative relation to an ink fountain and form cylinder.

In the drawing Figure l is a diagrammatic view showing the invention; and Fig.

2 is an enlarged detail sectional view of the,

connection between the ductor arm and the bearing block.

As illustrated, the form cylinder is represented at 11, the ink fountain roll at 12, and the ductor roll at 13, the ductor arm 14 being pivoted at 15. The ductor arm carries bymeans ofastud 16 a pivoted bearing block 17 within which slides a rod 18 pivoted at 19 to an operating member 20 attached at 21 to a crank arm 22 mounted upon a rotary or rock shaft 23 whereby a reciprocating movement is imparted at proper intervals to the rod 18. The medial portion of the rod 18 is enlarged throughout that portion 24: which hasv a sliding bearing within the block 17, thus providing oppositely facing shoulders which correspond substantially with the outer faces of the said bearing block. Abutment-washers 25, 25 are mounted upon the rod 18 and bear inwardly against the shoulders formed by the enlargement 24 and also against the outer faces of the bearing block while the two extremities of the rod 18 are provided with adjustable shoulders or stops in the form of threaded washers or nuts 26, 28. Between each pair of washers 25, 26, is disposed upon the rod 18 a coil spring 27.

It will be readily understood that as the ductor roll 13 is moved into contact with either of the ink members, that is to say the nk supply roll 12 or the ink receiving cyllnder 11, the spring 27 upon the opposite slde thereof will be compressed, the rod 18 sliding within the bearing block 17, and the pressure contact between the ductor roll 13 and the ink surface will be a yielding one corresponding to the tension of the spring 27; and as the ductor roll swings in alternation against the other ink member the opp 0s1te spring 27 will be placed under tension resulting in a corresponding yielding pressure between the ductor roll and the said ink member. By adjusting the nuts 26 upon the rod 18 the degree of pressure contact may be regulated within very exact limits, the springs being maintained under such 1n1t1al tension that they will yield only upon the apphcation of a considerable degree of pressure,

I claim: 1. In a printing press, the combination w th an ink-supply member and an ink-receivlng member, of a ductor mounted to contact alternately with the two members, a drivlng member, and yielding connections between the driving member and the ductor whereby to permit the ductorto yield in opposite directions as it contacts with each of the ink-members, each yielding connection including means to relieve the pressure of I 2. In a printing press, the combination I the resilient connections independently of the other.

3. In a printing press, the combination with an ink-supply roll, and an ink receiving roll, of a ductor roll mounted to swing between the ink rolls into contact alternately therewith, an arm carrying the ductor roll, a bearing block on the arm, a driving member, a rod attached to the driving member and slidable Within the bearing block, a pair of terminal bearing abutments provided on the'rod one near each of its ends, apair of intermediate bearing abutments provided on the rod one on each side of the block, and a spring disposed about the rod between the abutments on each side of the block, whereby to permit theductor to yield as it contacts with each of the ink members.

4. In a printing press, the combination with an ink-supply roll, and an ink receiving roll, of a ductor roll mounted to swing between the ink rolls into contact alternately therewith, an arm carrying the duotor roll, a bearing block on the arm, a driving member, a rod attached to the driving member and slidable within the bearing block, a pair of terminal bearing abutments provided on the rod one near each of its ends, a pair of intermediate bearing abutments provided on the rod one on each side of the block and slidable within the block, a washer bearing upon each of the intermediate abutments and adapted to bear against -the block, and ai-coil spring about the rod block, the rod having formed thereon in its medial portion a pair of shoulders corresponding substantially to the faces of the block, an abutment washer bearing against each of the medial shoulders and each face of the block, an abutment washer threaded on the rod at each of its ends, and a coil spring disposed about the rod between the two washers on each side of the block, whereby to permit the ductor to yield. as it contacts with each of the ink members.

In witness whereof I have hereunto I signed my name in the presence of two subscribing witnesses.

JOSEPH R BLAINE. Witnesses:

GEORGE J. DENNIS,

JOHN A. CARROLL.

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