US2122143A

US2122143A - Plate shaving machine

Info

Publication number: US2122143A
Application number: US115309A
Authority: US
Inventors: William F Huck
Original assignee: R Hoe and Co Inc
Current assignee: R Hoe and Co Inc
Priority date: 1936-12-11
Filing date: 1936-12-11
Publication date: 1938-06-28
Anticipated expiration: 1955-06-28

Description

June 28, 1938 w. F. HUCK 2,122,143

PLATE SHAVING MACHINE Filed Dec. 11, 1936 2 Sheets-Sheet 1 HI I04 INVENTOR.

A 1- "FY.

June 28, 1938. w. F. HUCK PLATE SHAVING MACHINE Filed Dec. 11, 1956 2 SheetsSheec 2 INVENTOH.

Patented June 28, 1938 UNITED STATES PATENT OFFICE to R. Hoe & 00., Inc.,

poration of New York New York, N. Y., a cor- Application December 11, 1936, Serial No. 115,309

19 Claims.

This invention relates to plate shaving machines and more particularly to shaving machines for printing plates, and has for its general object the provision of improvements in 5 such machines whereby the various operations of the same will be more fully automatic and more closely operatively associated.

Another object of this invention is to provide in a plate shaving machine an automatically actuatable plate holding down means with actuating means therefor, and interconnecting controls between the same and the plate reciprocating means.

Still another object is to provide controls for the operable parts of a plate shaving machine, whereby the attention required thereto is reduced to a minimum and its operation will be substantially simplified and facilitated.

A further object is to provide in a plate shaving machine having a reciprocable plate carriage, plate holding down means, and an adjustable cutter, control means for the means to actuate the above instrumentalities whereby only a single manual operation is required to start the actuation thereof for a complete cycle of operations on the plate.

A still further object is to provide in a plate shaving machine the combination of an electrical motor driven plate carrying table, an electrical motor movable plate holding down member, an electrically operable plate cutting knife, and electrical devices for interconnecting said motors and member whereby a start electrical switch, when actuated, will cause a complete cycle of operations thereof, and a stop electrical switch, when actuated, will stop the operations thereof regardless of the device in actuation.

'It is also an object of this invention to provide a plate shaving machine of generally improved construction, whereby the same will be simple, durable and inexpensive in construction, as well as convenient, practical, serviceable and efiicient in its use.

With the foregoing and other objects in view, which will appear as the description proceeds, the invention resides in the combination and arrangement of parts, and in the details of construction hereinafter described and claimed.

The preferred embodiment of the invention is illustrated in the accompanying drawings, where- Figure 1 is a side view of a plate shaving machine embodying the features of this invention;

Figure 2 is an enlarged view of the plate holding down mechanism of the machine;

Figure 3 is a section on line 33 looking in the direction of the indicating arrow thereon;

Figure 4 is an enlarged broken sectional view of the plate cutting blade actuating mechanism of the machine; and

Figure 5 is a schematic electrical circuit layout showing the controls for the various actuating devices of the machine and the interconnections therebetween.

The plate shaving machine illustrated in the drawings is of the type suitable for shaving a surface of a printing plate II by reciprocating it past a cutting blade 12. 'The complete and fully described details of this machine may be found by reference to Patent No. 2,040,437, issued May 12, 1936, over which the present invention is an improvement. Briefly, the machine includes a base frame [3, upon which a plate carrying table or carriage I4 is slidably mounted.

The table 14, in this instance, is reciprocated to H carry the plate ll past the cutting blade I2 by means of a rotatable threaded spindle l5, which threadingly engages the table l4 and is rotated in either direction by a reversible electrical motor I6, through sprockets I! and I8 respectively secured to the spindle l5 and a motor shaft l9, and which are drivingly connected by a chain belt 2!. The motor i6 is preferably of the well known type, which has a brake mechanism associated therewith which is automatically applied to stop and hold the motor as soon as the same is deenergized.

The plate cutting blade l2, see Figure 4, is mounted for swinging movement into and away from plate engaging position by being mounted upon a block 22, which is pivoted to a bracket 23 upon a shaft 24. Suitable stops 2!] limit the amount of swinging movement of the block 22 upon its pivot shaft 24. The block 22 is actuated to swing it into plate engaging position by an electrical solenoid 25 which, when energized attracts its armature 26 and draws it thereinto. This movement of the armature 26 through its connection with an arm 21 secured to the plate 22 swings the same and its supported blade I2 into the path of the plate H for shaving operation thereon when the table I4 is reciprocated in one direction herein, as shown in Figure 1, toward the right hand end of the machine. Deenergization of the solenoid 25 releases its pull upon the armature 26 whereupon the weight thereof, and of. the connecting parts, will swing the blade l2 upwardly and away from engagement with the plate II. A blade adjusting screw 28 is provided together with a blade clamping bolt 29 whereby the blade |2 may be respectively adjusted on the block 23 and secured in its adjusted position thereon.

As shown herein the plate II is retained in position on the table H by means of a plate engaging member 3|. A plate holding down device including a pair of opposed arms 33, one being disposed at each side of the machine with one of its ends pivoted upon a shaft 34 to the adjacent one of a pair of opposed side brackets 35. A plurality of plate engaging rollers 36 are disposed between the arms 33, each being rotatably mounted on a shaft 31, which extends between the arms 33 and is resiliently supported to each by a spring 38, whereby the rollers 36 will pressingly engage the plate H to hold it firmly against the table l4.

A reversible electric motor 4| is mounted upon one of the brackets 35. The motor 4|, through suitable reduction gearing, housed in a gear casing 42, is adapted to rotate a shaft 43, which is journaled in each of the brackets 35 and extends therebetween. A lever 44 is secured to the shaft 43 adjacent each end thereof. A link 45 connects the free end 46 of each lever 44 with the adjacent arm 33, which, when extended as shown in Figure 2, forces the arms 33 downwardly and thereby the rollers 36 into pressing engagement with the plate II. A stop plate 41 secured to the bracket 35 is positioned to be engaged by the end 46 of the lever 44 to limit its movement past the maximum extended position of itself and the link 45. The motor 4| is also of the type wherein a brake is provided which is automatically applied to stop and hold the motor when the same is de-energized.

The forward or cutting movement of the table I4 is limited by the use of a limit switch which is actuated by a lug 52 secured to the table I4 and engages the operating member 53 of the switch 5| when the table has reached the desired limit of forward movement. The switch 5| opens a circuit stopping the motor l6 and closes another circuit, whereby the rotation of the motor I6 is reversed and the table I4 returned to its start position. The reverse movement of the table I4 is limited by a limit switch 54, which is actuated by a lug 55 secured to the table l4 and engages the operating member 56 of the switch 54 when the table has reached its limit of reverse movement. The switch 54 opens a circuit stopping the reverse rotation of the motor Hi.

The rotation of the motor 4| to dispose the rollers 36 carried by the arms 33 into plate clamping position is limited by a limit switch 51 which is actuated by the end 46 of the lever 44 by its engagement with the operating member 56 of the switch 51. The switch 51 opens a circuit stopping the motor 4| and closes another circuit whereby the rotation of the motor 4| is reversed and the arms 33 are raised releasing the rollers 36 from pressing engagement with the plate I The arm up movement rotation of the motor 4| is limited by a limit switch 59, which is actuated by the end 46 of the lever 44 by its engagement when the arms 33 are in raised position, as shown in dotted lines in Figure 2, with the operating member 6| of the switch 59. The switch 59 opens a circuit stopping the motor 4|.

Referring to Figure 5, wherein the electrical controls and the circuits connecting the same are diagrammatically illustrated, it will be noted that only two push button switches, a start switch 62 and a stop switch 63 are required to cause actuation and interruption respectively of the machine through one cycle of its operations. The arrangement is such that by the closing of the common start switch 62 the machine operations start and continue uninterruptedly until completed, the stop switch 63 being used only when it is desired to stop the operations of the machine before they are completed. Assuming that a plate II has been disposed and clamped between the members 3| and 32 upon the table 4, the various devices are in the following po sitions, the table I4 is in its start position as shown in full lines in Figures 1 and 2, the arms 33 and the rollers 36 carried thereby are in raised position as shown in dotted lines in Figure 2, and the shaving blade I2 is in the dotted position shown in Figure 4.

After a plate II has been disposed upon the table M, as above described, the push button start switch 62 is closed. The closing of the switch 62 connects

contacts

64 and 65, 64 being connected by a conductor 66 to the line wire LL2 and 65 being connected by a conductor 61 to one terminal of a switch actuating coil 68 in a control box 69, the other terminal of the coil 68 being connected by a conductor 1| to the line wire LLI. Energization of the coil 68 will through suitable contacts controlling the motor 4| cause it to rotate to lower the arms 33 and thereby the rollers 36 into clamping engagement with the plate H on the table l4.

The circuit above described is maintained closed, even though the push button switch 62 is released by the operator due to the closing of a circuit from the conductor 66 through the closed stop switch 63 and a conductor 12 to a contact 13 of the down limit closed switch 51, through this switch from the contact 14 to a contact 15 through a switch 16 to a contact 11 and then to the coil 68 by way of

conductors

18 and 61, the switch 16 being closed by the initial energization of the coil 68. The initial movement of the arms 33 downwardly and away from the up limit switch 59 permits this switch to close whereby a low voltage coil 8| is energized while the switch 62 is being maintained closed by the operator.

By means of the switch 62 the coil 8| is placed in circuit with the line wire LL2, through the conductor 66, contact 64 and a conductor 82 connected to one terminal of the coil 8|, the other terminal thereof being connected by a conductor 83 to the up limit switch 59 and through it to the line wire LLI by the conductors 84 and 1|. The circuit through the coil 8| is maintained after the switch 62 is released due to the closing of a switch 85 across

contacts

86 and 81, the switch 85 being actuated by the coil 8|. The contact 86 is connected to the coil 8| by the

conductors

88 and 82 and the contact 81 is connected to the line wir-e LL2 through

conductors

89 and 12, switch 63 and conductor 66.

When the arms 33 and rollers 36 reach the desired limit of their downward movement, the switch 51 is actuated to open the circuit between the

contacts

13 and 14. This will open the circuit of the control coil 68 and the motor 4| stops. The switch 51, when so actuated, also closes a circuit between the contact 13 and a contact 9| whereby the motor I6 and, simultaneously therewith, the solenoid 25 are energized. The closing of the circuit between the

contacts

13 and 9| connects the line wire LL2 from the conductor 12 and the switch 63 to a now closed switch 92, closed by previous energization of the coil 8|, through a conductor 93 connecting the contact 9| with a contact 94 of the switch 92, and from the other contact thereof through a conductor 96 to a contact 91 of the forward table movement limit switch 5|. The circuit continues from a contact 98 of the switch 5| to one terminal of a motor control coil 99 in a control box IIII, through a conductor I02 and from the other terminal of the coil 99 through a conductor I03 to a closed switch I04 from which it is connected to the line wire LLI by a conductor I05. Energization of the coil 99 due to its action on suitable and well known controls, not shown, will cause rotation of the motor I6 to move the table I4 and with it the plate II towards the cutting blade I2. When the motor control coil 99 is energized, a switch I06 is closed connecting one terminal of the solenoid 25 with the line wire LI through a conductor I01, the switch I96, and from the switch through a conductor I08. The other terminal of the solenoid 25 is connected by a conductor I09 to the line wire LL2. Energization of the solenoid 25 disposes the blade I2 in plate shaving position, as shown in full lines in Figure 4.

The table I4 is now moved forwardly by the motor I6 through the instrumentality of the threaded spindle I5 until the lug 52 actuates the switch 5|. The initial movement of the table releases the switch 54 from the lug 55 whereby the switch 54 is closed. When the lug 52 actuates the switch 5| to open it and thereby stop the forward rotation of the motor I6, the coil 99 is de-energized, connection is established between the contact 91 and a contact I90, and the switch I06 opens to de-energize the solenoid 25 and the blade I2 is raised away from said plate II, as above described. At the same time that the switch I96 opens, a switch III which is also controlled by the coil 99, closes, whereby an up arm motor control coil I I2 is energized to cause rotation of the motor 4| to raise the arms 33 and the rollers 36 from the plate I I. Simultaneously, with the energization of the coil I I2, a table motor control coil I I3 is energized to cause reverse rotation of the motor I6 to move the table I4 backwardly into its initial start position by the closing of the switch 5| to connect the contact 91 with a contact I09 thereof.

The coil H2 is energized to cause the motor 4| to raise the arms 33 by being connected to the line wire LLI by the conductor II4 connected to one terminal of the coil I I2, the up limit switch 59 and conductors 84 and I I. The other terminal of the coil H2 is connected to the line wire LL2 by a conductor II5, a conductor H6 and a conductor III connected to a contact of a switch IIB closed by energization of the coil II3, the other contact of which is connected by a conductor II9 to the conductor I2, the stop push button switch 63 and the conductor 66. The operation of the motor 4| continues until the circuit is opened by actuation of the limit switch 59.

The coil H3 is energized by being connected to the line wire LI by a conductor I2I connected to one terminal of the coil H3 and leading to the switch III, which has been closed as above described, a conductor I22 leading from the switch III to the closed switch 54, and from switch 54 through a conductor I23. The other terminal of the coil H3 is connected tothe line wire LL2 by a conductor I24, the conductors I I6, switch 5| by connection of contacts I00 and 91 thereof, conductor 96, switch 92, conductor 93, switch 5'! by connection of contacts 9| and I3 thereof, conductor I2, the switch 63 and the conductor 66. As soon as thetable I4 starts backwardly, the switch 5| actuates to open the circuit between the contacts 91 and I00 thereof, but due to the now closed condition of the switch II8 closed by energization of the coil II3, the circuit through the coil II3 to the line wire LL2, is maintained by the conductors I24, I I6 and I II, the switch I I8, the conductors I I9 and I2 and the stop switch 63. The operation of the motor I6 continues until the circuit is opened by the actuation of the limit switch 54.

Opening of the

switches

54 and 59 stops the operations of the various devices of the machine after a complete cycle thereof, and they come to rest in their initial start positions, whereby a new plate II may be disposed upon the table I4. During any moment of the above described cycle of operations of the machine, interruption thereof is possible by actuation of the switch 63 to open the circuits, all of which are controlled thereby. It is to be understood that the control boxes 69 and II" contain suitable motor controls in combination with those illustrated, whereby the respective motors 4| and I6 may be connected to the line wires LI, L2 and L3 to properly energize the same for the desired direction of rotation.

By the provision of the features above described a plate shaving machine is particularly improved in respect to construction and operation. The principal improvement in operation comprises the provision of a single switch by the actuation. of which a complete cycle of operations is started, each of which is controlled by limit switches, certain ones being adapted to interrupt an operation and be actuated to start another operation. Another improving feature comprises the provision of a motor raised and lowered plate clamping device, the operation of which is started by the closing of a manually actuatable switch and which continues automatically until arrested by suitable movement limiting switches. The provision of a stop switch arranged to be in control of all of the operating devices of the machine permits the immediate interruption of the same should occasion demand such action.

It will be understood that the invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it is therefore desired that the present embodiment be considered in. all respects as illustrative and not restrictive, and it will be further understood that each and every novel feature and combination present in or possessed by the mechanism herein disclosed forms a part of the invention included in this application.

What I claim is:

1. In a plate shaving machine, a reciprocable plate holding table, a plate cutting member, a plate hold down device, said cutting member and said hold down device being mounted for movement into and out of engagement with a plate on said table, separate electrically operated means to operate said table, said cutting member, and said hold down device, and a common operation starting means for all of said operating means.

2. In a plate shaving machine, a reciprocable plate holding table, a plate cutting member, a plate hold down device, said cutting member and said hold down device being mounted for movement into and out of engagement with a. plate on said table, separate electrically operated means to operate said table, said cutting member, and said hold down device, and a common operation starting means and a common operation stopping means for all of said operating means.

3. In a plate shaving machine, a reciprocable plate holding table, a plate cutting member, a plate hold down device, said cutting member and said hold down device being mounted for movement into and out of engagement with a plate on said table, separate electrically operated means to operate said table, said cutting member, and said hold down device, a common operation starting means for all of said operating means, and movement limiting means for said plate hold down, device.

4. In a plate shaving machine, a reciprocable plate holding table, a plate cutting member, a plate hold down device, said cutting member and said hold down device being mounted for movement into and out of engagement with a plate on said table, separate electrically operated means to operate said table, said cutting member, and said hold down device, a common operation starting means and a common operation stopping means for all of said operating means, and movement limiting means for said plate hold down device.

5. In, a plate shaving machine, a reciprocable plate holding table, a plate cutting member, a plate hold down device, said cutting member and said hold down device being mounted for movement into and out of engagement with a plate on said table, electrically operated means for moving said plate hold down device, a plurality of electrically operated movement limiting means for said device moving means, one of said limiting means being operable to limit the movement of said device in one direction and to start its movement in the other direction.

6. In a plate shaving machine, a reciprccable plate holding table, a plate cutting member, a plate hold down device, said cutting member and said hold down device being mounted for movement into and out of engagement with a plate on said table, electrically operated means for moving said plate hold down device, a plurality of electrically operated movement limiting means for said device moving means, one of said limiting means being operable to limit the movement of said device in one direction and to start its movement in the other direction, means to operate said table and said cutting member moving means, and common operation starting means for all of said moving means.

7. In a plate shaving machine, a plate receiving table, an electrical table moving means, a plate engaging and holding down device, an electrically operated device moving means, electrical controls to limit the operation of said table moving means, electrical controls to limit the operation of said holding down device moving means, each of said limiting means being adapted to cause the reverse movement of one of said moving means.

8. In. plate shaving machine, a plate receiving table, an electrical table moving means, a plate engaging and holding down device, an electrically operated device moving means, electrical controls to limit the operation of said table moving means,

- electrical controls to limit the operation of said holding down device moving means, each of said limiting means being adapted to cause the reverse movement of one of said moving means, and common operation starting means for both of said moving means.

9. In a plate shaving machine, a plate receiving table, an electrical motor for moving said table, a plate hold down device, an electrical motor for moving said device, electrical control means to cause operation of said table moving motor, electrical control means to cause operation of said device moving motor, interconnecting means between said control means to cause each of said moving motors to reverse its direction, to reverse the movement of the device or table moved thereby, and a common means to initially start said motors.

10. In a plate shaving machine, a plate receiving table, means to reciprocate said table, a movable plate hold down device adapted to engage the plate on said table and to be disengaged therefrom, an electrical motor for moving said device, electrical means to limit the movement of said device in each direction, means to automatically reverse the device moving motor during a period of machine operation, and means to initially start said motor.

11. In a plate shaving machine, a reciprocably mounted plate receiving table, a swingably mounted plate hold down device, electrically operated means to cause said table to move in one direction and then to return to its initial position, electrically operated means to swing said device in one direction and then to return to its initial position, and electrical control means in connection with both said electrically operated means to cause a complete cycle of the aforesaid operations of said table moving means and said device swinging means.

12. In a plate shaving machine, a reciprocably mounted plate receiving table, a swingably mounted plate hold down device, electrically operated means to cause said table to move in one direction and to return to its initial position, electrically operated means to swing said device in one direction and then to return to its initial position, electrical control means in connection with both said electrically operated means to cause a complete cycle of the aforesaid operations of said table moving means and said device swinging means, and common electrical means to initially start said moving and swinging means.

13. In a plate shaving machine, a reciprocably mounted plate receiving table, a swingably mounted plate hold down device, electrically operated means to cause said table to move in one direction and to return to its initial position, electrically operated means to swing said device in one direction and then to return to its initial position, electrical control means in connection with both said electrically operated means to cause a complete cycle to the aforesaid operations of said table moving means and said device swinging means, and common electrical means to interrupt the operation of said moving and swinging means.

14. In a plate shaving machine, a reciprocably mounted plate receiving table, a swingably mounted plate hold down device, electrically operated means to cause said table to move in one direction and to return to its initial position, electrically operated means to swing said device in one direction and then to return to its initial position, electrical control means in connection with both said electrically operated means to cause a complete cycle to the aforesaid operations of said table moving means and said device swinging means, common electrical means to initially start said moving and swinging means, and common electrical means to interrupt the operation of said moving and swinging means.

15. In a plate shaving machine of the type described, a plate supporting table, electrically operated means to reciprocate said table from an initial position and then return it to its initial position, electrically operated means to stop said table upon its return to its initial position, a plate hold down device, electrically operated means to swing said device first into and then out of plate engaging position, electrically operated means tostop said device upon its return to its initial position out of plate engaging position, and common electrical means in control of both said table moving and device swinging means to initially start the operation thereof.

16. In a plate shaving machine of the type described, a plate supporting table, electrically operated means to reciprocate said table from an initial position and then return it to its initial position, electrically operated means to stop said table upon its return to its initial position, a plate hold down device, electrically operated means to swing said device first into and then out of plate engaging position, electrically operated means to stop said device upon its return to its initial position out of plate engaging position, and electrical control means in connection with said table moving and device swinging means to cause a substantially uninterrupted complete cycle of operations of each substantially simultaneously.

17. In a plate shaving machine of the type described, a plate supporting table, electrically operated means to reciprocate said table from an initial position and then return it to its initial position, electrically operated means to stop said table upon its return to its initial position, a plate hold down device, electrically operated means to swing said device first into and then out of plate engaging position, electrically operated means to stop said device upon its return to its initial position out of plate engaging position, electrical control means in connection with said table moving and device swinging means to cause a substantially uninterrupted complete cycle of operations of each substantially simultaneously, and common electrical means in control of said control means to stop the operation of said plate moving and hold down devices at any period of their operation.

18. In a plate shaving machine, a reciprocable plate holding table, a movable plate cutting member, a swingable plate hold down device, separate electrically operated means for actuating said table, said member, and said device, electrical interlocking connections between said electrically operated means including an electrical switch, which when actuated, will cause a. complete cycle of operations.

19. In a plate shaving machine, a reciprocable plate holding table, a movable plate cutting memher, a swingable plate hold down device, separate electrically operated means for actuating said table, said member, and said device, electrical interlocking connections between said electrically operated means, including an electrical switch, which when. actuated, will cause a complete cycle of operations, and an electrical switch, which when actuated, will cause an interruption in the cycle of operations.

WILLIAM F. HUCK.