US884302A - Printing-press. - Google Patents

Description

No. 884,302. PATENTED APR. '7, 1908.

J. H. STONBMETZ. PRINTING PRESS. APPLIOATION FILED JULY 27. 1907.

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PATENTED APR. 7, l1908.

J. H. STONEMETZ. PRINTING PRESS. APPLICATION FILED JULY 27. 1907.

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JOHN H. STONEMETZ, OF BOSTON, MASSACHUSETTS.

PRINTING-PRESS.

Specification of' Letters Patent.

Patented April 7, i908.

Application filed July 27, 1907.. SeriaiiNo. 385,923'.

To all whom it may concern:

Be it known that I,v JOHN H. STONEMETZ, a citizen. of theUnited- States, residing at lBoston, in the county of` Sulfolk and State of Massachusetts, have invented cei'tain new and useful Im rovements in.Printing-Presses, of which the ollowing 'isa speciiication.

My invention relates to improvements in the class of printing presses known as reciprocal bed, cylinder presses, and its objects are: irst; to. provide an improved means for stopping, reversing'V and returning the bed of the machine at each end of the stroke. Second, to provide a means whereby the motion of the bed will be uniform when an impression is being taken fromA thevtype. Third, to provide a means whereby the gear wheels that actuate the bed will always revolve in the same direction and without varying the speed, and whereby the stopping, reversing` and restarting of the bed will be done by mechanism independent of the actuating gear wheels, and, fourth, to provide animproved meansI for raising and lowering the impression cylinder as the bed advances or recedes in the process of printin these objects by the mechanism il ustratedin the accompanying drawing in which Figure l is a sectional elevation of a print-v ing press on the line x of Fi 3. Fig. 2is a bottom plan of the bedl showing thearrangement of the actuating gears. Fig. 3 isavertical section of the printing press on the line y y of Fig. 1. Fig., 42 is an elevation ofone end of the press with the side of. the frame cut away at Z to expose the cani and. gear that actuates the impression cylinder tore-- move its weight from; the bed when the bed. is returning after an impressionihas been taken.

Similar letters refer to similar parts throughout the several views.

A represents the frame ofthe press, B represen-ts the impression cylinder andy C represents the bed which is made to travel upon the rollers or wheels C' in the usual. manner..

For actuating the'bed C l. provide two gear wheels, D' and D". The gear wheel D' is driven directlyv from the driving pulley W, on the shaft K, while the l driven fromy the gear whee P, on the shaft K, through the medium of the intermediate gear wheel P meshing with the gear wheel Q on the shaft q, driving the gear wheel Q', which meshes with and drives the gear wheel D" in the opposite direction from the motion I attain.

for. these ear wheel D" is of the gear wheel D', as indicated by the ar.

rows-on saidsgear wheels. These gear wheels, D' and. D", are made to act alternately upon the rack D, as follows: The rackD is slidingly vsupported in the carriage C bv means of u n Y n slides e, as more plainly shown in Fig. 1,. so

. that they may be made to slideor reci rocate freely by means of the lever F, as ollows:

This lever is supported upon arms f that are mounted upon. t e shaft F", which extends nearly the entirel length. of the press frame and is supported to oscillate in the hangers d,

and l form a. bearing 2 longitudinal of the bed and secured to the slidese so that any motion of the lever F will be transmitted to therackD thusz. The arm'F' issecured to the fshaft F" and extends downward therefrom..

and has an antifriction roller f revolubly secured tothe lower endv in position to engage the groove h in the cam Wheel H, which latter is mounted on the shaft H', and stands at right angles with the shaft F and the ffroove h in said cam wheel H is so formed, as in Fig. 3, that it will carry the arm F' sidewise, at the desired time, `as the cam wheel revolves, thus causing the lever F to move accordingly, as indicated by thesolid and the dotted lines inFig. 3, and thus place the rack D in contact, alternately, with the gear wheel D', as indicated. by the solid lines, and theY Oear wheel. D", as indicated by the dotted.-

l lD-ines'i'nzFig. 3,.thuscausing the bed C to travel: iirsti in one direction, and then in the other, in

the usual manner. A

lt willbe readily seenv that as the gear wheelsD' and D" revolve' constantly at a uniform speed, the bed. C must, also, travel at the same uniform speed while being actuated by the gear wheels D' and D" ,l and that it would be impossible to reverse the ,motion of the kbed while either of the gear wheels,.D' and D" is engaged with the rack D, and, further, that it would be impossible to reverse the motion of the bed without first bringing it gradually to afull stop, and ur oses I have provided a. second set of rac (s, IE, which are securelv attached to the' under side of the bed C, the 'rack D, and have provide a swinging segment. or rack G or G', mounted upon al shaft g, or otherwise adjustably mounted in theV frame A in position, and so timed asto enga e its res ective' rackVr E, after the gear whee has reac ed very nearly the end of the rack D, and to carry the bed beyond the line arall el with of contact withfhe ,gear wheel'tlDhor D,

gradually lessening the motion of the bed until it comes to a full stop at the end ofthe stroke, and as gradually startingi'iand increasing the motion of the bed until itis,

again engaged'by the gear wheel D or D and carriedA at a full uniform motion until it is engagedfby the segment G at the opposite end of the frame A, which repeats the action of the former segment, as hereinbefore described.

The cam H is driven,l as by the gear wheel R, in the direction of the arrow on its periphery, and the offset in the groove h is so timed that the arm F is actuated to throw the lever F over. and'transfer the rack D from one gear wheel, as D-, to the other,`as D, and vice versa, after the rack D has left the gear wheel D or D, and'while the=bed is being actuated by one orithe other of the segments G, so that there is no possible danger of. the rack D engaging. both of. the gear wheels, D and D at thesame time.

The segments G G are actuated by the gear wheel D by means of the connecting bars J, pivotally secured at one end, y', to the segments and at the other end, as j', to the gear'wheel, so that the-revoluble motion of the gear wheel is transformed into a reciprocal motion ofthe se ments, and so timed that each segment wilgl engage its respective rack at the exact instant that themotion of the gear wheel and ofthe segment are uniform.

My ap liancev for raising the impression cylinder to relieve its pressure on the -bed when the bed is returning after having made an impression, consists of va cam, as H, mounted on the shaftH in position to actuate the head U, which Iis provided with a stem or bolt T surrounded with a spring T bearing'at one end upon the frame A and at theother end upon the head U to force the head U against the cam H i The head U is :provided with gear teeth u4 arranged to mesh with corres onding ear teeth S, on a wheel secured to t e shaft so that any movement of the head U, longitudinally, will cause t-he shaft I to revolve correspondingly. I lace an eccentric i upon the en d. of the shaft I and an eccentric strap o upon this. The eccentric strap is connected with` the vertical shaft-O, one at each end of the shaft 1,. which extend up to, and engage the boXesv-Irthat receive the shaft B that sup ortsvth'ecyl-inder B, so that when the shaftI is made'- to: revolve slightly the eccentric will cause the cylinder to rise or fall as desired,` andy as indicated by the solid and dotted lines in Figi 4. The downward motion of the cylinder' `is governed by the stop bolt V, at-the:y end fof l the arm V, which latter'is secured'f-to'the shaft I. The springO is simply to ease the movement of the lowered.

W represents a loose ulley for the driving belt to run upon when tlfie press is not in operation, and U represents a yoke integral with the head U, and designed to slide ove-r the shaft H to support the head and cause it to move in a direct line when actuated by the spring T and the cam H.

Having thus fully described my invention, what I claimas new and desire to .secure by Letters Patent of the United States, is:

l. In combination with a printing ress and a type bed, two driving gears revo ving Iat uniform motion in opposite directionsfa rackslidingly attached tothe bed in position to be made to mesh with each of the-gear wheels alternately, a lever pivoted near its longitudinal center to the frame and engaging the rack at one end and a cam wheel engaging the lever at the other end causing the lever to oscillate and move the rack alternately from one gear wheel to the other, racks secured to the bottom of the bed, and segcylinder as ,it is raised or ments arranged to engage said racks andactuate the bed as it approaches and starts to return from the ends of its travel and alternately with the gear Wheels.

: 2. In combination with a printing press, a reciprocating bed, a reciprocating rack movable laterally under the bed, a lever mounted on a shaft, a cam engaging one end of the lever and the other end of the lever engaging the reciprocating rack, two driving gear wheels revolving in opposite direc-tions at uniform speed, and in position to alternately engage the reciprocating rack, a rack secured to the bed, segments in position to engage said rack and stop and'reverse the motion of the bed alternately with the gear wheels, a cylinder, and means for raising and lowering the cylinder with the alternate movement of the bed.-

y 3. In combination with a printing press, a

reciprocating-bed, a reciprocating rack under the bed, gear wheels revolving in opposite directions and in position to be engaged alternately by the reciprocating rack, means for stopping and reversing the bed independent of the gear wheels, a cylinder, a rack, a spring actuatlng said rack' in one direction, a cam device actuating the rack in the opposite direction', a shaft, a gear. wheel on said shaft in position-to be actuated by the rack, an eccentric and .eccentric rod connecting the shaft -with the cylinder to raise and lower the cylin- -der with the alternate motions of the bed.

- Signed at Grand Rapids, Michigan, July vJOHN H. STONEMETZ.

In presence off I. J. CILLEY, A. ALLGIER.

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