US1043334A

US1043334A - Hot bending-machine for the treatment of printing-plates.

Info

Publication number: US1043334A
Application number: US49254109A
Authority: US
Inventors: Milton A Mckee
Original assignee: Individual
Current assignee: CB Cottrell and Sons Co
Priority date: 1909-04-27
Filing date: 1909-04-27
Publication date: 1912-11-05
Anticipated expiration: 1929-11-05

Description

M. A. MoKEE. v HOT BENDING MACHINE FOR THE TREATMENT OF PRINTING PLATES.

APPLIGATION FILED APR. 27,1909.

Patented Nov. 5, 1912.

4 SHEETS-SHEET 1.

l I J l l I I I I I I I I |I|||||| i i fizuenl on:

MQA. MoKEE. HOT BBNDING MACHINE FOR THE TREATMENT OF PRINTING PLATES.

I APPLIGATION FILED APR.27, 1909. 1,043,334.

Patented Nov. 5, 1912.

4 SHEETSSHEET 2.

Illll 42 kwh Wneomedv I l zwe nQ/w- M. A. McKEE.

HOT BENDING MACHINE FOR THE TREATMENT Or PRINTING PLATES. APPLICATION FILED APR. 21, 1909.

1,043,334. Patented Nov. 5, 1912.

4 SHEETS-SHEET 3.

M. A. MoKEB. HOT BBNDING MACHINE FOR THE TREATMENT OF PRINTING'PLATBS.

I APPLICATION FILED APR.27, 1909.

Patented Nov. 5, 1912.

4 SHEETS-SHEET 4.

Illllllfllli MILTON A. MOKEE, OF WESTERLY, RHODE' ISLAND, ASSIGNOR TO C. B. COTTREIIL & SONS COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

HOT BENDING-MACHINE FOR THE TREATMENT OF PRINTING-PLATES.

To all whim if; mag concern:

Be it known that I, MILTON A. MCKEE, a citizen of the United States, and resident of \Vesterly, in the county of \Vashington and State of Rhode Island, have invented a new and useful Improvement in Hot Bending- Machines for the Treatment of Printing- Plates, of which the following is a specification.

The object of this present invention is to provide a hot bending machine for the treatment of printing plates, the parts of which machine being so constructed and arranged that local pressure may be applied to the required degree upon the back of a previously curved printing plate at any desired point on the same to bring the entire plate to an absolutely accurate curve so as to insure an even printing impression by the plate when in use.

i In the formation of a printing plate, certain portions of the plate are necessarily made thicker than other portions thereof and therefore, when the printing plate is being rolled into its curved form in the usual manner, it is not always bent into a perfect curve but will be somewhat flattened at the thicker portions thereof owing to the greater resistance at these points to the curving rolls.

It is to obviate the above uneven curving of the plate that this present invention is directed.

This invention furthermore consists more particularly in the provision of a machine provided with a bending box comprising heated stationary and movable members arranged to receive a printing plate between them; means being provided for applying pressure locally to the back of the plate while held between the stationary and movable heated members of the bending-box.

In the accompanying drawings, Figure 1 represents the machine in side elevation, Fig. 2 represents the machine in end elevation, the upper member of the hot bendingbox being shown in full lines in its lowered position and in dotted lines in its raised position, Fig. 3 is a transverse vertical section taken in the plane of the line A-A of Fig. 1, the pressure shoe and its screw being shown in full lines in its vertical position and in dotted lines in another position, Fig. 4 represents the machine in top plan, and

Fig. 5 is a detail longitudinal vertical sec Specification of Letters Patent.

Application filed April 27, 1909.

Patented Nov. 5, 1912.

Serial No. 492,541.

'tion taken in the plane of the line B-B of Fig. 2.

The hot bending box comprises a lower stationary member 1 and an upper movable member 2, which members are kept at the desired degree of heat for permitting the proper treatment of the printing plate, not shown herein. Any suitable means may be employed for heat-ing the members of the hot bending box, such, for instance, as gas burners 3 and 4.

The lower member of the hot bending box is provided with an open-ended semi-cylindrical recess 5 for receiving the curved printing plate therein and the upper member of the hot bending box is curved semi-cylindrically for engaging the back of the printing lplate when located within the hot bending Legs 6 depend from the stationary lower member 1 0f the hot bending box and form a suitable support therefor to bring the box up to the desired height for ready manipulation of the printing plates. These legs (3 are arranged in pairs and are spaced rigidly apart by tie rods 7.

The means which I have shown for moving the upper member of the hot bending box in a right line toward and away from the lower member, is constructed, arranged and operated as follows :-Vertical lifting rods 8 extend through and are guided in their movements by the lower member of the hot bending box and are rigidly secured at their upper ends to the laterally extended arms 9 of the upper member of the hot bending box. In the present instance, these arms are shown as secured to said upper member by bolts 10 and the upper ends of the lifting rods 8 are provided with shoulders 11 between which and nuts 12 the arms 0 are secured. These arms 9 are of yoke form, as clearly shown in Fig. 4, to provide room for the segment to be hereinafter described. The lower ends of the lifting rods 8 are provided with racks 13 which mesh with pinions 14 fixed to the ends of a rock shaft 15 mounted in suitable bearings provided by hangers 16 depending from the lower member of the hot bending box. A weight 17 attached to the free ends of arms 18 fixed to the rock shaft 15 tends to rock the shaft in aposition to lift the upper member of the hot bending box away from the lower member. An arm 19 fixed to the rock shaft 15 is provided with adjusting screws 20, 21, engaging the opposite sides of an abutment 22 upon a trip arm 23 loosely mounted on the cross shaft 15 so that the position of the said arm with rotative relation to the cross shaft l5 may be accurately adjusted.

It is to be understood that when the

arms

19 and 23 are adjusted, they will both move together with the cross shaft 15.

A tripping device for engaging the free end of the arm 23 when the upper member of the hot bending box is lowered into engagement with theback of the printing plate, is provided, which tripping device is constructed, arranged and operated as fol: lows :A rock-shaft 24 is mounted in one pair of legs 6 and has fixed thereto an arm 25 arranged to engage the arm 23 on the cross shaft 15 to hold the weight 17 raised and the upper member of the hot bending box lowered until the arm 25 is released from the arm 23. A foot lever 26.is pivoted at 27 to one pair of legs 6 and is connected by a rod 28 to an arm 29 fixed to the rock shaft 24:. A spring 30 surrounds a rod 31 connected at one end to an arm 32 fixed to the rock shaft 24 and having its other end sliding through a guide 33 on one of the pairs of legs 6, which spring 30 is interposed between the said guide 33 and a. collar 34 on therod 31, tending to hold the arm 25 in the path of the arm 23 on the rock shaft 15. e

The means which I have shown for forcing the upper member of a hotbending box toward the lower member thereof a suiticient distance to permit the interlocking of the tripping device is also the means which I employ for applying local pressure to the back of the printing plate, which means is constructed, arranged and operated as follows :A double segment, comprising two

members

35, 36, has its base secured rigidly to the top of the lower stationary member of the hot bending box, as, for instance, by bolts 37, which segment spans the upper movable member of the hot bending box and also the recess 5 in the lower stationary member. This segment is cut away asuflicient distance to permit the uppermember to move away from the lower member a limited distance, the said segment serving as a stop to limit the upward movementof the upper member away from the lower member.

A hand screw38 has a screw threaded engagement with and extends through a block 39 provided with

trunnions

40, 41, rotatably mounted in the

members

35, 36, of the segment. This hand screw 38 is provided with a suitable handle 42 for turning the same. The lower end of this hand screw 38 is provided with a shoe 43 arranged to travel along a curved plate 44' secured along the concave face of the upper member of the hot bending box about midway its ends.

the back of the plate.

This shoe 43 is provided with a stud 45 uprising therefrom and entering an axial recess 46 in the lower end of the hand screw screw 38, which latch is fitted to travel along the

double segment

35, 36, as the hand screw is swung into different angular positions with respect to the upper member of the hot bending box, said latch being fitted to drop into any pair of a series of notches 48 in said segment, for holding: the hand screw against rocking movement when adjusted into its desired angular position but permitting a longitudinal movement of said hand screw.

In operation, supposing the hand screw 38 to be unscrewed and the upper member of the hot bending box held at the limit of its raised position by the weight 17.; the curved printing plate is inserted into position .within the recess 5 between the upper and lower members; the hand screw being inits vertical position. The hand screw 38 is then screwed inwardly thus forcing the upper member downwardly into clamping engagement with the printing plate. As this upper, member moves downwardly, the lifting bars -8 will also be moved downwardly and their racks 13 will rotate the pinions 14 and thereby rock the rock shaft 15. This will raise the arm 18 and thereby the weight 17 and. lower the interlocked

arms

19 and 23. As the upper and lower members are brought into their clamping position, the arm 23 will be swung downwardly sufliciently to permit the arm 25 of the tripping device to swing into position above the arm 23, as clearly shown in Fig. 1, thus locking the upper and lower members of the hot bending box in their clamping position. The hand screw 38 may then, be unscrewed sufiiciently to permit its free rocking movement. released from its engagement with the double segment and the hand screw is then rocked into any desired angular position, thus moving its shoe 43 along the curved plate 44 to any posit-ion where it is desired to exert a local pressure upon the back of the printing plate to insure its proper curvature. The latch 47 may then be inserted into its adjacent pair of notches 48 in the

double segment

35, 36, for holding the hand screw in position. The hand screw may then be screwed inwardly to the desired amount to exert the required pressure upon After the plate has been treated, the latch 47 may be released from the segment and the hand screw unscrewed and swung into its vertical position.

The double handled latch 47 is then The foot lever 26 may then be depressed for swinging the arm 25 of the tripping device into a position to release the arm 23 of the rock shaft 15. The upper member of the hot bending box will be automatically moved away from the lower member under the inture, the machine at the same time being very; simple and rapid in operation.

It is evident that various changes might be resorted to in the construction, form and arrangement of the several parts without departing from the spirit and scope ofmy invention; hence I do not wish to limit myself strictlyto the structure herein set forth, but

What I claim is 1. In a machine of the character described, a hot bending box comprising stationary and movable members arranged to receive a previously curved printing plate between them,-means for bringing the members into clamping engagement with the plate and swinging means for applying pressure 10- cally to the concave back of the said plate at different points thereon.

2. In a machine of the character described,

' a hot bending box comprising stationary and movable members arranged to receive a printing plate between them, means tending to separate the members and means for bringing 'the members into clamping engagement with the plate and for applying pressure locally to the back ofsaid plate at any desired point thereon.

3. In a machine of the character described. a hot bending box comprising stationary and movable members arranged to receive a printing plate between them, means tending to separate the members, means for bringing the members into clamping engagement with the plate and means for locking the members in their clamping position."

4. In a machine of the character described, a hot bending box comprising stationary and movable members arranged to receive a printing plate between them, means tending to separate the members, means for bringing the members into clamping engagement with the plate and for applying pressure locally to the said plate and means for locking the members in their clamping position.

5. In a machine of the character described, a hot bending box comprising stationary and movable members arranged to receive a printing plate between them, means tending to separate the members, means for bringing the members into clamping engagement with the plate and a tripping device for locking the members in their clamping position.

6. In a machine of the character described, a hot bending box comprising stationary and movable members arranged to receive a printing plate between them, means tending to separate the members, means for bringing the members into clamping engagement with the plate and for applying pressure locally to the said plate and a tripping device for locking the members in their clamping position;

7 Ina machine of the character described, a hot bending box comprising stationary and movable members arranged to receive a previously curved printing plate between them and a hand screw pivotally mounted on the stationary member. capable of being swung into different positions with respect to the plate and fitted to engage the movable member for applying pressure locally to the concave back of the said plate at different points thereon.

S. In a machine of the character described, a hot bending box comprising stationary and movable members arranged to receive a previously curved printing plate between them and a hand screw pivotally mounted on the stationary member, capable of being swung into diiferent positions with respect to the plate and fitted to engage the movable member for bringing the members into clampmg engagement with the plate and for applying pressure locally to the concave back of said plate at different points thereon.

9. In a machine of the character described, a hot bending box comprising stationary and movable members arranged to receive a printing plate between them. means tending to separate the members and a hand screw mounted on the stationary member and fitted to engage the movable member for bringing the members into clamping engagement with the plate.

10. In a machine of the character described, a hot bending box comprising stationary and movable members arranged to receive a printing plate between them, means tending to separate the members and a hand screw pivotally mounted on the stationary member and fitted to engage the movable member for bringing the members into clamping engagement with the plate and for applying pressure locally to the said plate.

11. In a machine of the character de scribed, a hot bending box comprising sta tionary and movable members arranged to receive a printing plate between them, means tending to separate the members. a hand screw pivotally mounted on the stationary member and fitted to engage the tionary member and fitted to engage the movable member for applying pressure locally to said plate and means for supporting the screw in its difierent angular positions.

13. In a machine of the character described, a hot bending box comprising stationary and movable members arranged to receive a printing plate between them, a

. hand screw pivotally mounted on the statlonary member and fitted to engage the movable member for bringing the members into clamping engagement with the plate and for applying pressure locally to the said plate and means for supporting the screw in its different angular positions.

7 14:. In a machine of the character described, a hot bending box comprising stationary and movable members arranged to receive a printing plate between them, means tending to separate the members, a hand screw pivotally mounted on the stationary member and fitted to engage the movable member-for bringin the members into clamping engagement wit the plate and for applying pressure locally to the said plate, means for supporting the screw in its different angular positions and a manually operated tripping device for locking the members in their clamping position.

15. In a machine of the character described, a hot bending box comprising stationary and movable members arranged to receive a printing plate between them, means tending to separate the members comprising a rock shaft having a rack and pinion engagement with the movable member and a weight tending to rock the said shaft and means for bringing the members into clamping engagement with the plate.

16. In a machine of the character described, a hot bending box comprising stationary and movable members arranged to receive a printing plate between them,

means tending to separate the members comprising a rock shaft having a rack and pinion engagement'with the movable member and a weight tending to rock the said shaft, and means for bringin the members into clamping engagement with the plate and for applying pressure locally to the said plate.

1 In a machine of the character described, a hot bending box comprising stationary and-movable members arranged to receive a printing plate between them, means tending to separate the members-comprising a rock shaft having a rack and pinion engagement with the movable member and a weight tending to rock said shaft, means for bringing the member into clamping engagement with the plate, and a manually operated tripping device for locking the members in their clamping position comprising an arm carried by the rock shaft and a spring pressed arm arranged toengage said rock shaft arm,

18. In a machine of the. character described, a hot bending box comprising stationary and movable members arranged to receive a printing plate between them, means tending to separate the members comprising a rock shaft having a rack and pinion engagement with the movable member and a weight tending to rock said shaft, means for bringing the members into clamping engagement with the plate and for applying pressure locally to the plate, and a manually operated tripping device for locking the members in their clamping position comprising an arm carried by the rock shaft and a spring pressed arm arranged to engage said rock shaft arm.

In testimony, that I claim the foregoing as my invention, I have signed my name in presence of two witnesses, this twenty-sixth .day of April, A. D. 1909.

MILTON A. MoKEE.

Witnesses A. 'R. STILLMAN, Gr. BENDIox.