US1584447A - Safety paper stop gauge - Google Patents

Description

May 11 1926. 1,584,447

'0. F. FRAUENBERGER SAFETY PAPER STOP GAUGE Filed April 17, 1925 .16 7 85 11M Qbto'wwq Patented May 11, 1926.

UNITED STATES ATENT GFFHQE.

CARL F. FRAUENBERG'ER, OF LONG ISLAND CITY, NEW YORK, ASSIGNOR TO S. H. ROSENBERG, 0F BROOKLYN, NEW YORK.

SAFETY PAPER .SIOP GAUGE.

Application filed April 17, 1925.

This invention relates to improvements in safety paper stop gauges for platen printmg presses, cutters, creasers and like machines.

The object of the invention is to provide safety paper stop gauges of simple, practical and novel construction particularly well adapted for use with heavy platen presses to be automatically operated or actuated by the press itself.

Another object of the invention is to so construct and arrange the safety paper stop gauges that they may be easily and quickly attached to the machine without requiring any material alteration thereof.

With the foregoing objects in View my invention is disclosed in the following specification and illustrated in the accompanying drawing in which- Figure 1 is a partial side view of a press equipped with my improved gauges.

Figure 2 is an enlarged detail view of one of the gages with parts broken away.

Figure 3 is a sectional view on line 33 of Figure 1 with parts broken away.

Referring to Figure 1 the press illustrated is of well known type comprising in general a suitable framework or support 5 having a fixed bed 6 and a platen 7. The latter is operated from the press by connecting rods as 8 (only one is shown) to rock or oscillate on a track 9 in a well known manner. The numeral 10 denotes the chase and 11 denotes the usual steel facing sheet on the platen.

In operation the paper, indicated at 12 in Figure 3, is fed against the usual gauges or stops 13. But because of the high speed at which the machine must be operated in order to be commercially profitable, there is danger of the sheet being fed to the platen so rapidly and hurriedly that the sheet will override the stops 13 and not register.

It is therefore necessary to provide means for momentarily arresting the movement of the sheet before it reaches the stop 13 so that it 'may gradually slide into position.

Such means consists in this instance of suitable yielding stop fingers 14 adjustably pivoted or secured at 15, 15 to gauge arms 16, 16. There is a stop finger at each side of the platen and as they are alike, the description of one of them will suflice for this disclosure.

The gauge arm 16 is secured to a short shaft Serial No. 23,788.

17 which is rotatably mounted in a supporting bracket 18 adapted to fit over the edge or corner of the platen. The bracket is secured by means of a bolt 19. The hole 20 for receiving the bolt is conveniently bored in longitudinal alinement with a screw 21 which secures the facing 11 to the platen.

The shaft 17 carries a cam 22 and is surrounded by a spring 23 which normally tends to turn the shaft .so as to keep the gauge arm and stop finger in the safety position shown in dotted lines in Figure 3. That is, the spring constitutes a means for maintaining the stop finger in sheet receiving safety position, and also for automatically returning the linger to such position after impression.

The cam 22 is shaped to cooperate with the portion 24 of the frame as shown in Figure 3.

The operation is as follows: When the platen is in sheet receiving position, the

- safety stop fingers are in similar position as shown in dotted lines in Figure 3. When the sheet is fed to the platen, it slides down thereon and is met by the finger 14:, which, as the platen moves down to impression position, gradually recedes and moves off the platen due to the fact, that the cams 22 abut the frame at 24 and are gradually moved outward.

The parts are so timed and arranged that the paper slides down against the stops 13 in proper registered osition before the press closes, at which time the safety stop fingers are moved entirely off the platen. lVhen the latter opens, the fingers are again moved into safety position by the springs 23.

The stop' fingers are easily and quickly attached to the platen and do not interfere with the work of the press. They prevent overriding of the paper over the stops 13 and insure that the sheet is in proper printing position.

The connection at 15 between the stop ill) finger and the gauge arm may be of any depaper stopping gauges carried. by said shafts, springs for normally moving said gauges in over the platen to momentarily arrest the movement of a sheet thereon and cams secured to the said shai'ts for gradually moving said gauges off the. platen as the latter moves into impression position, said cams being actuatedby contact with a fixed portion 01" the press.

- In a platen press the combination with the platen, of paper stop devices therefor comprising supporting brackets mounted on the platempaper stopping gaugesrotatably mounted in said brackets, and extending in the path of the movement of a sheet of paper fed to sa'idplaten, movable means adapted to contact with a fixed portion of said press for operating said gauges away from the platen as the latter moves into impression position and means for automatically moving said gauges back in overthc platen when the latter moves into sheet receiving position.

3. Safety paper stop gauges of the character, described v comprising a supporting bracket, a shaft j'ournaled therein, a paper stop gauge member mounted on one end of said shaft outside the bracket, anoperating cam mounted outside said bracket on the other end of said shaft and adapted to rotate the latterin one direction, and a spring Within said bracket for automatically rotating the shaft-in the opposite direction 7 CARL F. FRAUENBERGER.

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