US2105328A

US2105328A - Reciprocating bed motion for flat bed presses

Info

Publication number: US2105328A
Application number: US118287A
Authority: US
Inventors: Frederick R Molitor
Original assignee: Individual
Current assignee: Individual
Priority date: 1936-12-30
Filing date: 1936-12-30
Publication date: 1938-01-11
Anticipated expiration: 1955-01-11

Description

Jan. 11, 1938. F. R. MOLITOR RECIPROCATING BED MOTiON FOR FLAT BED PRESSES Filed Dec. 50, 1936 INVENTOR Fr-ecle 'L] BY WITNESSES I rickJLJYloZii'Or Patented Jan. 11, 1938 PATENT OFFICE RECIPROOATING BED MOTION FOR FLAT BED PRESSES Frederick R. Molitor, New York, N. Y.

Application December 30, 1936, Serial No. 118,287

3 Claims.

This invention relates to printing presses, and particularly to a reciprocating bed motion for ilat bed presses, the object being to provide an improved simplified construction of means for 5 moving the bed and associated parts.

Another object of the invention is to provide a reciprocating bed motion which permits an impression to be made upon each complete revolution of the impression cylinder.

10 A further object, more specifically, is to provide a reciprocating motion for fiat bed presses wherein the impression cylinder and the bed are so intergeared that the bed will move on its forward stroke during the first half of the revolu- 15 tion of the impression cylinder and will move on the return stroke upon the second half of the revolution of the impression cylinder.

In the accompanying drawing:

Fig. 1 is a fragmentary side elevation illustrat- 2 ing an embodiment of the invention;

Fig. 2 is a fragmentary sectional view through Fig. 1 approximately on the line 22;

Fig. 3 is a fragmentary sectional view through Fig. 1 approximately on the line 33, the same 25 being on a slightly enlarged scale.

Referring to the accompanying drawing by numerals, indicates a frame of a flat bed press. This press may be of any desired type, as for instance of the type known as the Miehle flat bed 30 printing machine. This machine is provided with a bed 2 of the usual kind and an impression roll 3 of the usual kind. It will be understood that paper sheets are fed to the machine in the usual way and as the bed 2 reciprocates 35 the sheets will be printed upon successively. The bed 2 may be supported and guided by suitable members 4 and has a rack 5 rigidly secured thereto, preferably on the under surface.

A bed gear wheel 6 continually meshes with 40 rack 5 and acts as means for moving the rack. Gear wheel 6 is keyed or otherwise rigidly secured to shaft 1, to which is keyed or otherwise secured a pinion 8. A comparatively large loose gear Wheel 9 is mounted on the shaft 1 and is rotat- 45 ably mounted between pinion 8 and abutment Ill. The loose gear wheel 9 continually meshes with the roller gear H which is connected through shaft l2 with the impression drum 3 so as to rotate therewith. A driving disk I3 is also keyed or 0 otherwise rigidly secured to shaft l2 so as to rotate therewith.

As shown in Fig. 1, a driving pinion |4 continually meshes with the loose gear 9, said pinion being rigidly connected with shaft I5, to

65 which a pulley I6 is also rigidly secured. Pulley I6 accommodates the driving belt I"! passing .over the small pulley l8 driven by the prime mover IS. The prime mover I9 is usually an electric motor and acts to provide power for driving the various parts just described. It will be observed that when the motor I9 is functioning the various gear Wheels just described will be rotating. As the pinion l3 rotates it will naturally move the wrist pin 20 in a circle. Wrist pin 20 is rotatably mounted in a link 2| which is pivotally connected at 22 to an arm 23. Arm 23 is rigidly secured to a hollow shaft 24 as shown in Fig. 3. A second arm 25 is also rigidly secured to hollow shaft 24 so that the

arms

23 and 25 will move in unison. These arms are each provided with a slot 26 through which the respective pins 2'! and 28 extend. These respec tive pins are adapted to be clamped tightly to the respective arms, while allowing the respective links 2| and 29 to freely swing.

Link 29 is connected through a journal pin 30 to the arm 3|. Journal pin 30 also extends through the power link 32 so that when the arm 3| swings, power link 32 will be reciprocated. It will be understood that the pin 30 is similar to the pin 28 and is rigidly clamped to the arm 3| in a slot 33, while at the same time allowing a proper swinging movement of

links

29 and 32. The power link 32 is pivotally connected at 34 to a rack 35 which is continually in mesh with the pinion 8, whereby said pinion is moved back and forth as link 32 functions. Rack is provided with an arm 36 which is preferably integral therewith, said arm being journaled on the hollow shaft 24 as shown in Fig. 3. 35

A standard 31 is carried by frame I and rigidly secured thereto in any desired manner, said standard accommodating the pin 38 as shown in Fig. 3, said pin being rigidly secured to the standard by the set screw 39. Standard 40 supports 40 the pin 4| in a similar manner to that shown in Fig. 3. Arm 3| is loosely mounted on pin 4| so as to readily swing. The

various slots

42, 26 and 33 permit a desired adjustment of the respective parts so that a proper action is secured. A rod 43 is pivotally connected at 44 to arm 36 and loosely passes through an abutment 45. A spring 46 acts against abutment 45 and a stop 47. Spring 46 is under tension at all times and tends to balance the weight of the respective parts 50 while at the same time giving a slight tendency to rack 35 to move from the position shown in Fig. 1 to the left.

By reason of the construction just described, when the motor I9 is functioning the various parts will also function and cause the bed 21 to reciprocate, while the impression cylinder 3 rotates always in the same direction. For the first half of the rotation of the impression cylinder 3, bed 2 will move forward to its extreme position, and then on the second half or completion oif the rotation, bed 2 will move back to its first or starting position. It will therefore be seen that upon each revolution of the impression cylinder, one sheet of paper is printed.

I claim:

1. A reciprocating bed motion for flat bed presses including a rack secured to the bed of the press, a gear wheel continually meshing with said rack, means for driving said gear Wheel;

saidlbed to function, said means including a disk secured'to said cylinder so as to rotate therewith, a journal pin carried by said disk and positioned 'to'move in a circle when said disk rotates, a

substantially reciprocating link'having one end journaled on said pin, a segmental rack provided with an arm extending normal thereto, means for pivotally mounting the free end of said arm, link mechanism connected to one-end of said link and to one end of said segmental rack for reciprocating said rack, a pinion continually meshing with said segmental rack, a bed rack secured to said bed, and a gear wheel-rigidly secured to said pinion for meshing with said bed rack.

3. The combination with a fiat bed press having an impression cylinder and a reciprocating bed, of means for causing said bed to have one complete cycle of action upon one revolution of said cylinder, said means including a rack secured to said bed, a primary gear wheel secured to said cylinder, an idler gear continually meshing with said primary gear wheel, a pinion continually meshing with said idler gear, power means for rotating said pinion, a rack actuating gear continually meshing with said rack, a pinion rigidly connected with said rack actuating gear, a segmental rack continually meshing with said second-mentioned pinion, said segmental rack having an arm extending normal thereto, means at the outer end of said arm for pivotally supporting the arm so that said segmental rack will continually mesh with said second-mentioned pinion, a substantially reciprocating link having one end pivotally connected to said cylinder so that as said cylinder rotates said link will reciprocate,.a power link having one end pivotally secured to said segmental rack near one end, an arm having one end pivotally connected to the outer end of said power link and the opposite end pivotally mounted in a fixed position,

and means forconnecting the outer end of ,said,,

reciprocating link with the joint, of said power link and said arm so that as said reciprocating Y FREDERICK R. MOLITOR.