US2247997A - Finishing machine plate stop - Google Patents

Description

July 1, 1941. L. J. GRlNr-:R Erm.

\ FINISH'ING MACHINE PLATE STOP Filed July 12, 1958 2 Sheets-Sheet l July 1, 1941.

L. J. GRINER E-rlpu. 2,247,997

FIISHING MACHINE PLATE- STP 2 Sheets-Sheet 2 Filed Jul-y 12, 1958 @we 270% fn'ffef.

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Patented July 1, 1941 UNITED STATES PATENT OFFICE FINISHING lllACHIN-E PLATE. STOP a corporation of Virginia Applicationv July 12, 1938, SelialNo. 2181.793

(Cl. 29-21l 6 Claims.

This invention relates to a plate stop for a finishing machine and particularly for a pony autoplate stereotyping machine.

The principal objects of the invention are to provide a new and improved means for positioning the stereotype printingv plate in such a Way that the cast bevel end of the plate is used as the locating point to co-act with a novel design of plate stop which will stop the plate in just the proper position for the iinishing operation; to provide a very accurate location of the platewith reference to the cut-off saw and trimming tool since the cast beveled end of the plate can be made to contact with the stop snugly and thereby contact all plates in a simple and accurate manner.

Other objects and advantages of the invention will appear hereinafter.

Reference is to be hadto the accompanying drawings, in which Fig. 1 is an end View of a pony autoplate machine, looking toward the shaving arch;

Fig. 2 is a central longitudinal sectional view through the shaving arch showing the plate and tail being pushed intoit;

Fig. 3 is a similar View showing the plate and its tail in its nal position against the stop;

Fig. 4 is a longitudinal sectional view through the stop in the position in which it holds the plate in proper position;

Fig. 5 is an end View of a plate stop;

Fig. 6 is a longitudinal sectional View showing the beveling tool for the end of the plate;

Fig. 7 is an end view of the arch showing a modified form, and

Fig. 8 is a view similar to Fig. 4 on the line 8-8 of Fig. 7 showing the second form of plate stop.

It is well known that stereotype plates IB, as produced in the pony autoplate machine, are cast with one end beveled to size at I I and the other end with a blank portion I2 of its length, known as the tail, which must be severed from the useful length of the plate before the plate can be used on the press. 'I'his severing operation is accomplished by a cutting 01T saw I3. A beveling tool I4 carried on the rotating knife bar I5 bevels the opposite end edge. They are so positioned relative to plate stops, on the knife bar bearing, as to cut oi the plate to the correct length and bevel.

Heretcfore lugs have been cast, during the stereotype casting process, on the inside of the tail, these lugs serving to co-act with the stop referred to above on the knife bar bearing to position properly the plate for the severing and beveling operation. Obviously, this lug, being on the inside of the tail and out of the vision of the operator, the method of positioningv the plateA has met with considerable disfavor` in the trade. To correct this situation this present invention relates to a new and improved method of positioning the plate, in which the case lug on the inside of the tail has been dispensed with and in its stead the cast bevel end II of the plate is used as the locating point to co-act with a novel design of the plate stop- In the form of the invention shown in the rst six figures, the plate I0 with its integral tail I2 is pushed by hand into the arch 9 in the direction of the arrow in Fig. 2. As it moves. in thisl direction, it passes along a stop II pivoted at I8 and counterweighted so as to bring the upper end of it inside the plate. When' the plate is passed through beyond the stop I'I., the stop turns by gravity to the vertical position shown in Fig.. 3.

It is to be understood' that the plate is manipulated by hand over the usuall knife bar I5 and when it comes to a position where the'stop tips up as just stated, the plate is moved back by hand against this stop. which is' positively prevented` from turning backwardly. This s-topis mounted on a casting I-9 which is concaved on the bottom to t the contour of the knife bar I5.

The casting I9 is provided with longitudinally elongated slots 2l), into which extend screws 2|. This casting I9 can be adjusted by a screw 22 andy the screws 2| tightened down to hold the stop in place to provide for the adjustment to printing plates of various lengths. The position in which the stop I'I can beheld can be varied slightly by means of a stop screw 23. This provides a simple and accessible mea-ns: of adjustment.

In operation, the stereotype plate and tail are pushed into the arch, in the direction indicated by the arrow, causing the stop lever to assume the position shown in Fig. 2. It is pushed a little further until it has passed the stop lever to permit that lever to return by the action of gravity to its normal position, as shown in Fig. 3, but in this case the plate is spaced from the stop. The plate is now pulled back by hand until it is placed with its cast bevel edge against the stop lever, as shown in Fig. 3. It is now positioned relative to the saw I3 and the trimming or beveling tool I4.

In the form shown in Figs. 7 and 8 the stop is modiiied in two parallel ways. The first modication consists in providing two stops which are spring-seated instead of the single counterweighted stop, above described. In a similar manner a casting'30 is secured to the knife bar in a conventional manner. The plungers 3l are arranged at a suitable distance apart around the circumference and extend radially. They are slidably mounted in sockets in the casting 3l) so that they move readily. Springs 32 are provided for normally moving them outwardly. Their outward motion is limited by stop screws 33.

As the plate with its tail passes over these stops, the springs are compressed, permitting the stop proper to be depressed by the Weight of the plate.

When the plate passesv over the stops they will l ables the operator to operate the plate by one hand and locates that hand at the center of the` semicircular edge. f

In both these designs, it is evident that a very accurate location of the plate with reference tov the cut-off saw and trimming tool can be accomplished. They perform their function in a long Well known manner. The beveled end of the plate which is cast, as contrasted with a beveled end which is finished, may be made to contact the stop snugly and thereby locate all plates which come through the machine, one after another, in a simple and accurate manner. This also avoids the difficulties mentioned at the beginning of the specification.

Having thus described our invention and the advantages thereof, we do noft wish to be limited Y to the-details herein disclosed, otherwise than as set forth inthe claims, but what we claim is:

. 1. The combination with a stereotype plate nishing machine provided with an arch for receiving the plate to be finished and a knife bar, of a movable stop mounted on the bar in the arch beneath theVr plate and adapted to contact the inner surface of the plate while it is being moved into the arch, and means for automatically bringing the stop into position at the rear of the plate to prevent the movement of the plate back beyond the stop.r v

2. The combination with a stereotype plate finishing machine provided with a finishing arch and a knife bar, of a movable stop mounted on the barV within the arch and beneath the plate as it is being moved into position Within the arch and -contacting the underside of the plate, said stop being yieldable to allow the plate to move in its normal course into a position-for finishing and also capable of moving into a projected position behind the rear edge of the plate when the plate passes over it and releases it and is in the proper position within the arch for finishing.

3. The combination with a stereotype plate finishing machine provided with an arch for receiving the plate to be finished and a knife bar, of a counterweighted pivoted stop mounted on the bar in said arch beneath Ithe plate, the stop contacting the inner surface of the plate as the plate is being moved into the arch, the stop turning on its pivot forwardly with respect to the plate and, when the plate moves beyond the stop, the vstop automatically turns up to vertical position where the upper portion thereof projects beyond the bottom of the inside of the plate at the edge thereof and prevents the movement of the plate back beyond the stop.

4. The combination with a stereotype plate 1inishing machine provided with a rotating knifebar carrying a cutting device, and having an arch for receiving the plate through one end thereof, of an upwardly movable stop mounted on the bar within the arch and beneath the plate when same is inserted into the arch in position to contact and engage the undersurface of the plate as it is moved into the arch, -the plate holding the stop down until the end of the plate passes the stop, and a spring beneath the stop for forcing the stop up beyond the back edge of the plate at that time, thus preventing movement of the plate back beyondthe stop.

5. The combination with a stereotype plate holding arch arranged for receiving the plate in a straight line through one end thereof and provided with a rotary knife bar carrying a cutting device, of a movable stop located on said bar in position to engage the inside of the plate as it is moved into the arch, whereby the plate will hold n the stop down until the end of the plate passes the stop, a spring under the stop for forcing the stop out beyond the back of the plate as the plate passes the stop, and means for limiting the motion of the stop outwardly in the arch.

6. The combination with a stereotype plate fmishing machine provided with a rotating knife bar carrying a cutting device and having an arch for receiving the plate through one end thereof, of a movable stop mounted on said bar beneath the plate having a portion contacting the inner surface of the plate as it is being moved Within the arch, and means for automatically moving the stop into position at the rear of the plate to pre- Y CERTIFICATE OF CORRECI ON lPatent No. aime-97. July 1, 19in.

LESLIE "JOHN GRINER, ET AL.

It is hereby certified that error appears in the 4printed specification ofthe above numbered patent requiring,- correction as. follows: Page l, second column, line 8, for the word "case" read --cast; line 5b., for "parallel" read principal-q and that the said Letters Patent should be read with this correction therein that the samemay conform to the record of the case in the Patent Office.u

Signed 'and sealed this 5th day`o` August, A. D. l9lpl.

Henry Van Arsdal'e, (Seal) Acting Commissioner of Patents.

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