US698344A - Printing-press. - Google Patents

Description

No. 698,344. f Patented Apr. 22, i902.`

A. P. WARNER.

PRINTING PRESS. (Application med July 19, 1901.) (No Model.)

UNITED STATES PATENT I OFFICE.

AUSTIN P. WARNER, OF BATTLECREEK, MICHIGAN, ASSIGNOR 'l-O THE DUPLEX PRINTING PRESS COMPANY, OF BATTLECREEK, MICHIGAN.

PRINTINGfPRESS.

SPECIFICATION formingpart of Letters Patent N O. 698,344, dated April 22, 1902. Application lerl July 19, 1901. SerialNo. 68,933. (No model.)

To a/ZZ whom, t may concern:

Be it known thatl, AUSTIN P. WARNER, of Battlecreek, in' the county of Calhoun and State of Michigan, have invented certain new and usefulImprovementsinPrinting-Presses5 and I hereby declare thaty the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, which form partof this specification. lo This invention is an improvement in bedand cylinder presses, particularly webpresses, wherein movable impression-cylin-` ders are reciprocated back and forth over type-beds to print webs, asin the Well-known Cox duplex press, for example. l It is important in this style of presses that the impression-cylinder shall be packed so that its pe.- riphery will correspond exactly with the pitchline of the cylinder-gear by which the cylinzo der is kept in time with the bed. If the cylinder be packed too much, so as to increase its diameter even very slightly beyond the exact size, it would ordinarily result in the periphery of the cylinder moving slightly 2 5 faster than it should do, thereby creating a tendency to grind the face of the type and to feed the web over the type While being impressed. On the other hand, if the cylinder be packed too little, so that it is slightly less 3o than the proper diameter, it would ordinarily cause the periphery of the cylinder to lag or drag on the type and tend to pull back the paper duringimpression, which will crack or tear the web. This improper packing of 3 5 the impressioncylinder with the incident damage resulting therefrom is a source of great annoyance in many press-rooms where the pressman is careless in packing the cylinders.

4o The object ofthis invention, therefore, is to reduce Wear on the type and prevent breaking or cracking the Webs during the printing operation when such wear and cracking would be caused by the improper packing of the surface of the impression-cylinder, and the invention consists in means for compensating for improper packing of the cylinder and permitting it to move only at the proper peripheral speed while on the type and to compen- 5o sate the cylinder after each impression, so

'ing it to normal position.

that it will always begin its operation in the correct timeand position.

The invention, in brief, resides in making one member of the bed and cylinder-gearing slightly movable, but holding it to its normal 5 5 position by sti springs, so that the cylinder will be kept in time and rolled properly over the bed as if each member of such gearing was absolutely iiXed to its support, as in ordinary press constructions; but if the cylin- 6o der be packed too high or too low the springcontrolled member will yield sufficiently to prevent grinding of the type or cracking of web while the cylinder is on impression, and as soon as the cylinder passes off impression the spring will return the gear member to its original position, thereby slightly turning the cylinder forward or backward and bring- The actual corrective movement of the cylinder in either 7o case will bevery slight, possibly less than an eighth of an inch, but that this amount of drag or acceleration during impression would be sufficient to damage the type or web, as is obvious. i 7 5 In the drawings I have shown the bed-rack member ofthe gearing as the spring-controlled member, asit is perhaps simpler to make the bed-rack spring-retained than the cylinder-gear, although the practical eect 8o would be the same ifthe bed-rack was rigidly secured and the gear-springvsecured on the cylinder.

I will now describe the invention as illustrated in the drawings, wherein; 8 5 Figure l is a detail side elevation of the bed4 and cylinder of a press, and Fig. 2 a top plan view of Fig. l.

A represents the impression-cylinder, having packing B, bearers C, and gear F, as 9o usual.

K is the type-bed, coacting with the cylinder.

D D are straight bearers ooacting with cylinder-bearers C, and E is the bed-rack, meshing 1 with cylinder-gear F. This rack E is usually rigidly bolted to the frame and its office, in connection with the cylinder-gear F, is to cause the periphery of the cylinder to move uniformly in relation to the bed. In the preszoo I the cylinder is underpacked, so that its periphery tends to `drag on the typeor web, the rack will yield sufliciently to prevent the cylinder damaging the type or web. In the same manner the rack will yield if the cylinder be overpacked. In either case as soon as the cylinder is off impression, as indicated at A A2 in the drawings, the springs return the lftk E to proper central position, and this movement of the rack returns the cylinder also to true initial position after each impression.

Having thus described my invention, what I therefore claim as new, and desire to secure by Letters Patent thereon, is-

l, The combination of a'cylinder and bed, and the bed and cylinder-gearing, one member of such gearing being normally held to place by springs whereby'a slight abnormal increase or'decrease of speed of movement of the periphery of the cylinder is permitted during impressions by the bodily shifting of one of such members, said spring returning the gearing to proper normal position after impressions, substantially as described.

2. The combination of a cylinder and bed, a gear on the cylinder, and a rack on the bed or frame meshing with said cylinder-gear, said rack being capable of a slight bodily endcylinder and prevent grind or drag on the type, substantially as described.

4. The combination of the cylinder and bed, the cylinder-gear, and a movable bed-rack continually in mesh With the cylinder-gear and springs at each end of the rack to hold the same Ain normal position but permit its shifting during impression, substantially as and for the purpose described.

5. The combination of the cylinder, its gear, the bed, and the one-piece bed-rack having slotted ends and continually in mesh with the cylinder, guide-pins on the'bed or frame engaging the rack-slots, and stili springs interposed'between the opposite ends of the rack and lugs or stops on the frame for yieldingly holding said rack in position, substantially as described.

In testimony that I claim the foregoing as my own I affix my signature in presence of two witnesses.

AUSTIN P. WARNER.

In presence ofr Jos. H. J oNEs, Il. P. KUNTZ.

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