US1231668A - Printing-press. - Google Patents

Description

C. B. SWINK.

PRINTING PRESS.

APPLICATION FILED OCT. 23. I913.

Patented July 3, 1917.

2 SHEETS-SHEET I- WITNESSES INVENTOR.

C. B. SWINK.

PRINTING PRESS.

APPLICATION FILED 0cT.-23. i913.

Patented July 3, 1917.

2 SHEETS-SHEET 2- V Z3 Z0 nnnn INVENTOR. 4. Q W

WITNES SE51 EKM llTE @TAT3 FAB FFTQE.

CHARLES B. SWINK, OF DELPHOS, OHIO, ASSIGNOR, BY MESNE ASSIGNMENT-S, TO THE DELPI-IOS PRINTING PRESS COMPANY, OF DELPHOS, 01-110, A CORPORATION OF OHIO.

I PRINTING-PRESS.

menses.

Specification of Letters Patent.

Patented July 3, 191%..

App1ication filed October 23, 1913. Serial No. 796,794.

To all whom it may concern:

Be it known that I, CHARLES B. SWINK, a citizen of the United States, and a resident of Delphos, in the county of Allen and State of Ohio, have invented a certain new and useful Printing-Press; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the characters of reference marked thereon, which form a part of this specification.

My invention relates to printing presses and particularly to that class of presses which have reciprocable bed plates and rotatable pressure cylinders.

The object of the invention is to produce a printing press having efficient and durable mechanism which will directly drive the cylinder and the bed plate and cause the pressure cylinder to rotate at a speed which varies according to the operations of the other parts of the machine.

In the operation of the machine and while an impression is taken the surface of the cylinder must of necessity move with the bed plate. The cylinder is lowered before and raised after a print is taken. The cylinder is rotated at a slower speed when the bed plate returns than when the print is taken to give the bed plate time for return ing and raising and lowering of the cylinder. The cylinder is driven by a set of double gear which time the movement of the cylinder to accord with movement of the bed plate on the printing stroke and to rotate the cylinder at slow speed when the bed plate is returning. The bed plate is driven by a crank block located directly under and in the vicinity of the bed during the printing stroke. The cylinder gear and the bed gear are driven direct from the drive shaft which makes an efficient and powerful cylinder and bed drive and permits the use of a low frame.

The invention may be contained in a number of constructions. One construction is selected as an example of the machines that embody my invention and it is described herein to showhow such construction'may be made and operated.

Referring to the drawings, Figure 1 is a side view of a part of a printlng press which embodiesmy invention. Figs. 2 and 3 illustrate details of construction of a part of the mechanism shown in Fig. 1. Fig. 1 illustrates a side view of the press shown in Fig. 1, partly broken to show some of the interior mechanism, and Fig. 5 illustrates a transverse section of the press.

- 1, Fig. 1, is the frame of the printing press. 2, Figs. 4: and 5, is a bed plate in whichthe chase is located. 3 is the pressure cylinder. The mechanism operates to move the bed plate back and forth beneath the cylinder 3. When it is moved in one direction the cylinder presses the paper against the type located on the bed plate 2 and a print is taken. When the bed plate returns the paper is removed and the cylinder 3 is raised.

10 is the driving pulley. 11 is the driving shaft supported at one end in the bearing 12 located in the bracket 13 and at the other end in the bearing lthung on the frame 1. Pinions 15 and 16 are secured to the shaft 11.

The pinion 16 operates upon a gear-wheel 17, which rotates on the shaft 19. The gear 17 drives the bed 2 back and forth. A block 20 (Fig. 1) is secured by a bolt to the gearwheel 17 The block 20 moves in a channel or way 21 formed in a bracket 22. The channel frame is secured by braces 23 and is strengthened by ribs 24:. The bracket is secured to the bed frame 25, which is carried back and forth on the frame 1. The bed 25 is provided with channels 26 which slide along rails 27 formed on the frame 1. The bed 25 is also secured to the frame. 1 by means of the brackets 28 which extend under ledges 29 formed on the frame 1. i

As the gear 17 is rotated the block 20 slides up and down in the channel 21 and carries the bed 25 back and forth on the frame 1. The movement of the frame 25 is consequently sinusoidal, its speed being maximum when the block 20 is located at the ends of the channel 21 and minimum when the block 20 is located at the center of the channel.

The bed plate 2 is provided with rails 30 which set into channels 31 formed in the bed 25. The bed 25 is provided withgear wheels 32 secured to the bed frame by means of pins 33. The cog-wheels 32 are rotated as the bed moves by racks 34 located on the ledges 29 of the frame 1. Racks 35 are also located on the under side of the bed plate 2 so that as the bed frame 25 is shifted back and forth by the operation of the cog-wheel 17, and as the upper teeth of the cog-wheels 32 move twice as fast as the lower teeth of the cog-wheels and the bed 25, the bed plate '2 will move at twice the speed and move 15. The cylinder is supported on a shaft 50,-

which is mounted in movable bearing blocks 51 located in the frame 1. The pinion 15 located on the shaft 11 operates upon the gear-wheel 52. The gear-wheel 52 is connected to a double gear having offset gear faces for causing the cylinder to move at a varying speed according to the operations of the bed plate 2. The gearing is supported on the shaft 53. It has the blank 5% and a uniform driving portion 55 on one side. This is shown in Fig. 5. It also has a blank 56 and an irregular portion 57 which c0613- erates with the cylinder gear to cause sinusoidal movements of the cylinder surface to correspond with the movement of the bed plate when a print is taken. The double gear operates on a double gear connected to the shaft 50. The double gear connected to the shaft 50 has the uniform drive gear face 59 and an irregular gear face 60 and a blank portion 61. The gear face 59 is operated upon by the gear face 55 and causes the cylinder to rotate at a slower speed than when the-irregular portion 60 is operated upon by the irregular portion 57, to give the bed plate an opportunity to return to be inked and also to permit the cylinder to be raised and lowered.

The cylinder is raised and lowered by means of a cam, which is operated by the cog-wheel 17. The cylinder shaft 50 located in the blocks 51 is moved up and down in the frame 1. The blocks 51 slide along the ribs or keys 7 0; Rods 71 are secured to the blocks 51 and to the blocks 72 by means of nuts 7 3 which clamp the blocks to the shoulders74c. Blocks 75 adj ustably movable along the keys or ribs 76 located in the frame 1, are secured in position by means of screw bolts77. A shaft 78 is located between the blocks 72 and 75, and is provided with cam surfaces 79 which spread the blocks 72 and 75 when the shaft 78 is rotated. When the blocks are spread the blocks 72 are forced downward. which pull with them the blocks.

51 by means of rods 71. This carries down the cylinder 2.

Springs 80 are located between the frame 1 and adjustable screw bolts 81 having fiat heads. The bolts 81 are secured in the blocks 51 and locked in position by means of the nuts 82. The cams 79 operate in op osition to the springs 80 to pull the blocks 51 down when the shaft 78 is turned in one direction. When the shaft 78 is turned in the opposite direction the springs 80 operate to lift the cylinder.

The shaft 78 is operated by the cog-wheel 17 in which is located a cam-way or channel which is provided with concentric portions, one, 91, havin about half the radius of the cog-wheel an one, 92, located near the shaft 19. It also has intermediate por tions which connect the two tions 91 and 92. A. roller 93 is located in the cam way 90. It is mounted on a lever 9 1 pivoted to a bracket 95 secured to the frame 1. As the cog-wheel 17 rotates the roller 93 and the upper end of the lever 4: is

concentric porswung back andforth to the left of the shaft.

19 and between the shaft and half the radius length of the cog-wheel 17. The upper end of the lever 94 is provided with a roller 96. A link 97 is provided with a slot or notch98 by means of which the link 97 may engage with the roller 96 located on thelever- 94. The link 97 is secured to a crank arm'99. The crank arm 99 is secured to the shaft 78. As the lever 94 is carried back and forth by the operation of the cam-way 90 the crank 99 is swung back and forth about a quarter of a turn. The crank 99, the shaft 78 and cams 79 are thus given a reciprocatory quarter turn movement each time the cog-wheel 17 is rotated which pulls the cylinder down against the operation of the springs80 and permitsit to be raised by the springs 80. This is done each time the cog-wheel 17 completes a reciprocation of the bed plate.

If desired the cams 79 may be disconnected from the operating lever. 9% by means of the'foot lever 100. The foot lever 100 is pivoted to the frame 1 and is connected to a bell crank 101 by meansof a rod 102. The bell crank 101 is pivoted to the frame 1 by means of the bearing 103. The bell crank 101 is provided with a roller 10% which'operates between two ridges secured to or forming apart of one end of the link 97. If the foot lever is operated when the link is carried to the left the roller 104 will rise in advance of the ridge 105, but whenthe link 97 is brought toward the shaft 19 the ridge 105 will ride up on the roller 104: and, consequently, at the completion of the printing stroke, the link 97 and the crank 99 will be disconnected from their operative mechanism. The link will thus be held up and the mechanism disconnected as long as the foot lever 100 is pressed by the foot. If,however, the roller 104. is under the lower end of the ridge 105 the link 97 will be inane-1 diately disconnected from the lever 9%. When the foot lever is released the roller 96 will again catch the link 97 and at the proper times the cam 79 will be operated and the cylinder 2 lowered and raised.

The wheel 52 is provided with a means for adjusting the double gear with respect to the gear on the shaft which operates the cylinder 3 particularly to give the gear connected to the cylinder the proper relative free movements to allow for raising and lowering the cylinder 3 with respect to the bed plate 2. The means for adjusting the double gear operated by the wheel 52 consists of a sleeve 110 surrounding the shaft 53 having an eccentric outer surface on which the hub of the wheel 52 is located. The sleeve is shrunk or forced onto the shaft 53. A cap plate 111 is secured to the shaft or bearing stud 53 by means of the screws 112. The sleeve and stud may be turned to any position and locked by means of the nut 113.

In the operation of the mechanism the wheels rotate in the direction indicated by the arrows. A print is taken when the driving crank block 20 is located in the vicinity of the bed frame and near the upper end of the channel 21. This gives great strength and long life to the mechanism since the crank block is located in proximity to the bed on which it operates and prevents any wedging or levering or loosening of the parts. Furthermore the gear wheels 17 and 59 are directly driven by the drive shaft 11. When the cylinder is raised, the teeth 55 on the wheel 52 mesh with the teeth 59. The gear face 55 gives a slower speed to the cylinder which gives opportunity for the clips to operate and gives time for the operation of other mechanism of the printing press. The portion 57 which operates upon the portion 60 bulges from the center of the wheel 52 and causes the cylinder 3 to rotate more rapidly and synchronously with the bed movement when a print is taken. It takes up the operation of the cylinder from the action of uniform driving portion 55 of the wheel 52. The uniform drive faces of the gears again come into play when the paper is removed and the cylinder raised. The cylinder is then lowered whereupon the irregular faces again cotiperate to drive the cylinder.

The construction described may be greatly varied by those skilled in the art and yet such modifications may still come within the scope of my claims.

What I claim as new, and desire to secure by Letters Patent, is as follows:

1. The combination of a reciprocatory bed plate, a depending bracket mechanically connected to the bed plate and having a channel, a wrist pin movable in the channei,

a gear wheel, the said wrist pin connected to the gear wheel and movable in the channel for driving the bed plate, an impression cylinder, a pair of double off-set gears for driving the impression cylinder, a gear wheel connected to the offset gears, a driving shaft, and a pair of pinions located on the shaft for driving the said gear wheels.

2. The combination of a bed plate having racks, a bed frame having gears meshing with the racks, a supporting frame having racks meshing with the gear wheels, a depending bracket secured to the bed frame and having a channel, a gear wheel, a wrist pin secured to the last named gear wheel and movable in the channel, an impression cylinder, means for raising and lowering the impression cylinder, a pair of double off-set gears for driving the impression cylinder, a gear wheel connected to the off-set gears, a driving shaft, and a pair of pinions located on the driving shaft for driving the said gear wheels.

3. The combination of a bed plate, a bed frame having gears, a supporting frame, racks located on the bed plate and the supporting frame, meshing with the gears, a depending bracket having a channel and secured centrally to the bed frame, a gear wheel, a wrist pin movable in the channel and secured to said gear wheel, an impression cylinder, a pair of double off-set gears, a gear wheel connected to the off-set gears, a driving shaft, and a pair of-pinions secured to the driving shaft for driving the said gear wheels.

In testimony whereof, I have hereunto signed my name to this specification in the presence of two subscribing witnesses.

CHARLES B. SWINK.

Witnesses:

JOHN F. LINDEMANN, Gus'rAvn W. EYsnNBAoH.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). 0.?

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