USRE12124E - Printing-press - Google Patents

Description

No. 12,124. REISSUED JUNE 23, 1903.

J. F. AMES.

PRINTING PRESS.

APPLIUATION FILED JAN. 20, 1902.

2 SHEETS-SHEET l,

RE ISSUED JUNE 23 J. F. AMES.

PRINTING PRESS.

ARPLIOATION rum) JAN. 30, 1902.

'2 SHEETSSHEET 2.

UNITED STATES Reissued June 28, 1903.

JOHN F. AMES, OF PORTLAND, OREGON.

PRINTING-PRESS.

SPECIFICATION forming part of Reissued Letters Patent No. 2,124, da'ted June 23, 1903. Original No. 686,380, ma November 12, 1901. Application for reissue filed January 20. 1902. Serial No. 90. .4.7.

To all Hr/mm it may concern:

lie it known that I, JOHN F. AMEs, a citizen of the United States, residing at Portland, county of Multnomah, State of Oregon, have invented an Improvement in Printinglrcsses; and I hereby declare the following.

exact description of the means by which the ink is. prevented from being transferred to the protecting-strips, means whereby all the devices are securely locked to the cylinder by a single operation, and details of constructionto be more fully described hereinafter.

Referring to the accompanying drawings, Figure 1 is a longitudinal section on the line w m, Fig. 2. Fig. 2 is a plan, the ink-well and distributing-rollers being omitted. Fig. 3 is a view of the type-cylinder, the type-form being omitted. Fig. 4 is a longitudinal section on the line as (1;, Fig. 5. Fig. 5 is a trans verse section on the line I/ y, Fig. 4. Fig. 6 is an end view of a clamp. Fig. 7 is a side elevation of a bearing-strip. Fig. 8 is a transverse section on the line 5 .2, Fig. 7.

My invention is especially designed for the purpose of securing printing types or characters upon a revolving cylinder, so that they may be employed for printing bags, the wooden sides or parts structed, and for like purposes.

The press consists of a bed A, upon which the material to be printed is supported, a cylinder .2, adapted to carry the type, en-

graved surface, or form from which the impression is to be made, an ink-Weill and distributing-rollers 4 so disposed that ink-from thewell is transferred as desired to. the form or printing surface during the revolution of the cylinder. Any suitable or well-known mechanism or gearing may be employed to drive the various parts in unison, consisting of which boxes are con-.

of driving pulleys and gears, which may be arranged as shown in the drawings. The cylinder is made with longitudinal slots or chan nels,- as at 5, and in line with these channels the locking-clamps 6 are. movable. These clamps have shanks extending through the slots 5, and within and interior to the cylinder are formed the nuts 7, whichare adapted to travel upon the screws 8. These screws are of any suitable number and extend lon gitudinally from end to end of the cylinder, having shoulders which abut against the inner ends of the cylinders, and thus retain the screws in position. The ends of the screw shanks extend through one end of the cylinder and are made of convenient form, as shown at 9, to receive awreneh or means by which they may be rotated. Each screw is. made with right and left threads, respcc tively, upon opposite sides of the central line, and when the screws areturned in one direction the locking clamps or lugs U are caused to simultaneously approach and clamp the edges of the printing block or form or intervening strips, so as to firmly lock the form upon the cylinder. .liy'reversing the turn of the screws the clamps are retracted, thus allowing the form to be removed. This insures each oppositely -disposed pair of clamps being moved in unison and equallyto grip the opposite sides of the form or plate at the same instant by turning a single screw in one direction, and as each pair of clamps is movable witlrrelation to a common circumferential line it will be manifest that all the clamps will exert an even pressure upon the form-plate from end to end.

\Vhen this press is' employed for printing the boards from which boxes are made, a difficulty arises from careless sawing ot' the boards, which may vary as much as a quarter of an inch, more or less,-in thickness, and which therefore will b'ringvery unevenpressure and strain upon the printing-surface. These boards are piled 'in considerable nu mbers between upright guides or holders in upon the bed A, and by means of a chain 11,

having lugs projecting from it at intervals, the lowermost of the boards in the pile is advanced so as to pass between the printingcylinder and a corresponding pressm-e-rollor I to properly print the thinnest of these boards,

below, by which suflicient pressure is brought to bear to imprint the words or characters upon the wood. When .the apparatus is set it will be manifest that when thicker boards pass between the rollers a serious strain and pressure is brought to bear upon the typesurface. These surfaces when used for printing boxes are usually made of very hard metal, which is often broken by unequal strains, and in order to protect the type-sot face from the strains caused by the difference in thickness of the boards I have shown bearing-strips curved to the same form as the type-surface, fitting the cylinder and having tongues, as at 18, which extend into the slots 5 of the cylinder.' These guard-strips 12 are interposed between the clamping-lugs 6 and the edges of the form, and the meeting edges of the two and also the contiguous edges of the locking-clamps are beveled, as shown at 14, orotherwise made so that when they'are pressed together the protecting-strips act to hold the printing-form in place, and'the clamps in turn lock the protecting-strips. These strips are made of a sufliciently less height than thetype, or printing surface so that a good impression of the latter will be madev upon any material upon which the printing is ,to take place; but when by reason of greater thickness of the material an undue pressure is brought uponthe printing-surface this pressure is received upon the parallel protecting-strips 12, and the printing-surface is thus relieved of all pressure except sufficient to secure a good impression. These strips afford protection when thick boards are passed through the press, because the I lower cylinder has underneath it a heavy piece of rubber 31 at each end of the shaft, so that when any extra pressure is occasion ed by the passing of a board of unusual thickness between the rollers the rubber-yields and permits the thick board to pass through. If the lower cylinder was not supported by these rubbers, but the shaft fixed to move rigidly in the boxes, whenever a thick board was passed between the cylinders thev brand and even the protecting strips would be forced into the boardto the extent of the extra thicknessand the press would stop or something would break. The type or'printin'gsurface being composed of letters ora design more readily presses into the brand than would the protecting-stripson the side, which presents the planed solid surface. ,The chief strain on the type or printing surface is when it first comes in contact with the board to be printed. If, for instance, the press is set to print aboard one-half inch thick and one' three-fourths inch thick is presented by the feeding-lug to be printed, the brand as it revolves on the nppercylinder would strike the board with a severe blow. The protectings'trips by passing entirely around the cylinder, or at least half-way, receive the board as soon as it is pushed in by the feeding-lug on the chain above the lower cylinder, so that when the brand is presented to the board the lower cylinder has been depressed by the protecting-strip sutficiently to relieve the type or printing surface of all strain. In order to prevent the ink on the distributing-rollers from being deposited upon these strips and eventually making unseemly marks upon the material which is to be printed, I have shown protecting strips or guards, which consist'of thin, preferably elastic,'plate's of metal .15,

so curved as to partially follow the contour of the inking-roller and to lie between this roller and the strips 12, which are clamped upon each side of the printing-surface. The convexed lower surfaces of the guards '15 rest upon the curved protecting-strips 12, and any ink which may have been distributed upon the inking-roller upon the width of the sur-. face to be printed will be thus prevented'from being deposited upon the protecting-strips 12. These guards 15 may be supported in any suitable or convenientmanner from parts of the printing-press. As here'shown, they are fixed to metal blocks 16, which are grooved or channeled to fit a bar 17, which extends conveniently across the frame of the. apparatus, and by means of hooks, as at 18, they are supportedupon a rod or shaft 19, extending across from one side to the other of the frame. This allows them to be readily removed whenever desired, and they may be locked in positionby set scre'ws, as at 20.

Having thus described my invention, what I claim, and desire to secure by Letters 'Patent, is-

1. The combination in a printing-press of a cylinder adapted to carrythe printing-surfaces, slots' or channels made longitudinally in the cylinder, clamps guided and movable in said slots and having threaded interior nuts, segmental guard-strips interposed between the adjacent edges of the clamps and fro form or printing surface and of less heightv opposite ends passing respectively through the nuts of the clamps upon opposite sidesof the printing-plate, said screws havingshoul-s ders abutting against the-inner ends of the cylinder and projecting through one of the ends having means to which a wrench or device may be applied whereby they maybe turned to cause the gripping-clamps to apupon each side of the printing-plate, consist-- ing of guards interposed between the inkingroller and the blocks.

4. The combination in a printing-press of a cylinder having longitudinal slots in its sur-' face, a printing form or plate fitting the surface of said cylinder, screw-actuated clamps movable in the slots to lock or release-the printing-plate, curved strips interposed between the lugs and the plate having the surfaces of such height as-to relieve pressure upon the plate, a roller by which ink is applied. to the printing-surface, guards interposed between the roller and the on rved strips at each side of the printing-plate and blocks to which the guards are secured, said blocks having means for securing them to the sup-.

porting parts of the press.

5. The combination in a printing-press of a longitudinally-slotted cylinder, a printingform curved to fit thereon, clamps slidable in the slots, guard-strips interposed between the edges of the clamps and printing-form,'and reversely-threaded screws engaging and actuating the clamps upon opposite sides of the form, said strips having edges adapted to interlock with the edges of the form and clamps.

6. The combination in a printing-press of a longitiulinally-slotted cylinder, a curved form or printing-plate upon the cylinder, segmental guards upon each side of the form and having locking edges, said guards having lugs on their inner faces adapted to engage the slots in the cylinder, means engaging the outer edges of the guards, an impressionroller, and yielding journal-boxes therefor whereby the pressure upon the form is regu lated.

7. The combination with. a printing-cylinder and a form or printing-plate therefor, of clamps guided and movable upon the cylinder.at opposite sides of the plate, and means including single substantially equally spaced parallel screws each having right and left threads at opposite ends, and nuts connected with the'clamps and fitting the screws, whereby the clamps are si multaneously and equally moved in opposite directions.

h. A printing cylinder with parallel slots from end to end of its periphery, single screwshafts turnably journaled interior to each slot, each having right and left screw-threads at opposite sides of the center, a printing form or plate fitting the'cylinder-surface, and

clamps therefor with nuts fitting each of the right and left screws.

9. The combination with a printing form or plate and'a cylinder upon which it fits, of clamps guided and movable between the ends and center of the cylinder, nuts carried by the clamps, single substantially e ually.

spaced parallel shafts each having righ and left screw-threads upon opposite ends, and each passing through one pair of the nuts, and-means for turning the screw-shafts from one end and in one direction to equally ad- Vance or retract the clamps from opposite sides.

10. The combination witha printing-cylinder, and an independent form or plate, of

clampslocated upon opposite sides of the form, and having oppositely-screw-threaded nuts, single correspondiugly-threaded parallel screws each passing through a pair of nuts and turnable to equally advance or retract the clamps on opposite sides in unison and simultaneously grip or release the form. 11. The combination with a printing-cylinder having a series of open slots from end to end parallel with its axis, of a curved form or printing-plate, clamps located at opposite sides of the plate with nuts projected through the cylinder-slots, the pair in each slot having right and left screw-threads respectively and a single shaft having its opposite ends right and left threaded to fit each pair of nuts, and means for turning the shaft.

12. The combination with a printing-cylinder and its form or plate,of parallel shafts with the-ends journaled and turnable in the cylinder end-s, right and left screw-threads upon each pair movable simultaneously and equally to or from each other upon a single shaft by turning the shaft.

' 13. A printing-cylinder and means for securing printing-plates therein consisting of a series of clamps, to grip opposite sides of .the plate, said clamps having shanks with nuts on the inner ends,longitudinally-disposed slots in the periphery ofthe cylinder through which the shanksof the clamps are movable, and parallel, equally-spaced shafts extending between the ends of the cylinder, each having right screw-threads upon one end, and left threads upon the other end, to

turn in corresponding threads in the. clampnuts, whereby both nuts are simultaneously advanced to grip the plate, or retracted.

In witness whereof I have hereunto set my hand.

JOHN F. AMES.

Witnesses:

S. H. Nounsn, JESSIE 0. 3110131121.

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