US2620727A - Hot die printing machine - Google Patents

Description

9, '1952 PACKER ETAIL 2,620,727

HOT DIE PRINTING MACHINE Filed Jan. 15, 1947 7 Sheets-Sheet l lNVENTORS O L.PACKER 3 G-E-PACKE R L. PACKER ETAL HOT DIE PRINTING MACHINE Dec. 9, 1952 7 Sheets-Sheet 2 Filed Jan. 15, 1947 5 dd: T L w "Ala/ Dec. 9, 1952 PACKER EI'AL HOT DIE PRINTING MACHINE 7 Sheets-Sheet 5 INVENTORS L.PAC.\' ER G.F -F cKER AT Ys Filed Jan. 15, 1947 Dec. 9, 1952 PACKER ETAL HOT DIE PRINTING MACHINE '7 Sheets-Sheet 4 Filed Jan. 15, 1947 Dec. 9, 1952 PACKER ETAL 2,620,727

HOT DIE PRINTING MACHINE 7 Sheets-Sheet 6 Filed Jan. 15. 1947 In INvENToRs FAQ KER AND G.E.PAG\'\ER Dec. 9, 1952 'L. PACKER ETAL HOT DIE PRINTING MACHINE '7 Sheets-Sheet 7 Filed Jan. 15, 1947 5 9 R E I WA my Patented Dec. 9, 1952 [UNITED STATES ATENT GFFICE HOT DIE PRINTING MACHINE Leonard Packer and George Ernest Packer, Glasgow, Scotland 4 Claims. (Cl. 101-27) This invention has reference to die stamp printing.

in position after the printing and a substantial lapse of time before the printed sheets are ready for delivery. It will also be appreciated that the printed paper before it is dried, must occupy a substantial amount of space.

The present invention has for its object to provide improvements in die stamp printing machines by which the labour, time and space heretofore required will all be substantially reduced.

This invention will now be described with reference to the annexed drawings which illustrate one form of machine in accordance with the invention and wherein:

Figure 1 is an elevation of the machine, the die and counter die being shown in their shut or closed positions.

Figure 2 is a plan view of Figure 1.

Figure 3 is a sectional elevation on the line 3-3 Figure 2.

Figure 4 is a view corresponding to Figure 3 but showing the die and counter die in the open posi- Figure 5 is a sectional elevation on the line 5-5 Figure 2.

Figure 6 is a further plan view of the machine but showing the inking and wiping gear removed.

Figure 7 is an elevation of cam mechanism for controlling the means for applying the wax to the die and for removing the surplus wax therefrom.

Figure 8 is an end elevation thereof partly in section, the section being on the line 8-8, of Fig ure 7 and Figure 9 is a view corresponding to Figure '7, but showing the reverse side of the cam mechamsm.

In the drawings I is the .die which is secured to a die carrier 2 mounted on a shaft 3 which is supported in bearings 4 carried by the machine frame 5. Said carrier is provided with a pair of lugs 6 pivotally connected at 6 to slotted rods 1, the latter being curved at their upper ends as shown.

Said rods, at their lower ends carry fixed rollers 8 and also rollers 9 loaded by helical compression springs E0. The fixed and resiliently loaded rollers bear on diametrically opposite points of cams H fast on a shaft l2 which is driven through any suitable gearing by a motor l3. Said shaft passes through the slots in said rods and thereby aids in guiding said rods when they are operated as will be hereafter described. The die is provided with an electric heating element l controlled by means of a thermostat l see Figures 3 and 4.

Rotation of the cams I! through the aforesaidmechanism results in the die being moved from the shut position Figures 1, 3, 5 and 6 to the open position, Figure 4 and then back to the shut position.

The Work plate M is supported at its lower side by means of pivot pins l5 journalled in bearings [6 carried by the machine frame. Said work plate carries the plate It on which is mounted the counter die IB A rocking movement is imparted to the work plate by means of toggle links I! connected to the work plate and pivotally anchored at H to brackets l'l secured to the machine frame. The pivotal joint [1 of the links is connected to a slotted rod l8. This rod carries a fixed roller I9 and a roller l9, said rollers bearing on diametrically opposite faces of a cam 20 fast on the said shaft l2. Said shaft passes through the slot in rod l8 and thereby aids in guiding the latter during its longitudinal movement. The plate Iii is resiliently mounted, compression springs 2| forming a resilient support for the counter die. The brackets I'l are adjustable vertically so that the pressure exerted by the counter die on the die can be varied.

The rotation of the cam 20 operates through the toggle mechanism to swing the work plate with plate H5 and counter die from the shut position shown in Figures 1, 3, 5 and 6 to the open position shown in Figure 4 and then back to the shut position.

A roll 22 of wax impregnated tape, hereafter referred to as the inking tape, is mounted on a spindle 23 carried by a tape carrying frame 24. The wax with which the tape is impregnated is in preference that known as engravers wax and used in name plates and the like. Said frame is pivotally mounted on a spindle 25 mounted on bearings 25 carried by the machine frame the tape carrying frame being thereby capable of a rocking movement in a vertical plane. The inking tape passes from the roll over a guide roller 26, see Figures 3 and 4, over an inking iron 2'! over a second guide roller 26 over an intermittently driven roller 28, and then between the latter and a friction roller 28 to a Winding reel 29, said rollers, inking iron and winding reel being all carried between the sides of the tape carrying frame. The inking iron is provided with an electric heating element Zi which is controlled by means of a thermostat 2T Said winding reel may be driven by any suitable means. For example it may be driven by means of a belt and pulley drive 29 from the roller 28, the pulley on the reel spindle having a friction connection to the winding reel so that it can slip as the reel becomes filled.

A roll 35 of a die wiping tape is mounted on spindle 3| carried by a Wiping tape carrying frame 32 which is pivotally mounted on a spindle 33 mounted in bearings 33 carried by the machine 7 frame so as to be capable of a rocking movement in a vertical plane. -The wiping tape passes from said roll over a guide roller 34, under a wiping roller 35, back over an intermittently driven roller 36, and between the latter and a friction roller 31 to a winding reel 33, said rollers and reel being all carried between the sides of said frame 32. The winding reel is driven by means of a belt and pulley drive 33 driven by the roller 3t the drive permitting of slip as in the case ofreel 29.

Secured to brackets as carried by the machine frame, one at each side thereof, are box like guides 49 in each of which is fitted a sliding cage 4| see particularly Figures '7, 8 and 9. Each cage at its lower end carries a roller 42 which co-operates with a cam groove hereafter described. Within each cage are two cored slides, one being the wiping slide 53 and the other the inking slide M. ihe two wiping slides carry the spindle 43 of the wiping roller while the two inking slides carry a spindle l l on which is mounted the inking iron 21. In the cored slides are helical compression springs d5 which urge the slides downward. On the upper ends of the springs are spring carriers M which bear pressure adjusting screws 61 which are threaded into internally tapped holes in the upper sides of the cages ll.

The inking and wiping slides at their lower ends carry rollers 48 and 49 respectively, which co-operate with adjustable cams, one at each side of the machine and formed of two segments 53 and carriedby the shaft 3. V

Secured on the shaft 3 are cams 5i each having a cam track concentric to the axis of the shaft as at 52, and having a straight track as at 53, the ends of the straight track being controlled by spring loaded pawls 5t and 55. The rollers 42 ride in the said cam tracks so that when the cams are rotated in a clockwise direction the rollers 42 are moved into the straight track and the cages 4! are drawn downwards and thus the springs are placed under compression. When the cams are rotated in the reverse direction the rollers ride in the concentric cam tracks, 52 and thereby positively move the cages upwards.

When the cages are pulledas aforesaid the slides cannot perform a like movement until permitted to do so by the said- cam segments 55 and 58 whereupon the slides move downwards so that first the inking tape and thereafter the wiping tape make contact with the heated die. Thereafter the cam segments move the slides upwards, i. e. away from the die. When said cams 5! are rotated in the reverse direction the 4 pressure is. taken oif the springs by the upward movement of the cages.

The means for feeding the inking and wiping tapes and the means for adjusting the extent of the feed will now be described with particular reference to Figures 1 and 2.

Fast on the spindle 33 carrying the roller 35 is aratchet wheel 53 carried by an arm 55 loose on said spindle. To said arm is pivotally secured the upper end of a link 56 the lower end of which is pivotally connected to a carrier 5'! mounted on a pair of parallel arms 58 pivoted at 59 and carrying a roller 60. Said roller cooperates with an adjustable cam face or inclined plane 5| secured to rotate with the cams 5E) and 50 Consequently when said cam 6| is moved in a clockwise direction it causes said arms 58 to tilt about their pivot and such movement is transmitted through the link 56 and arm 55 to the pawl 54 which thereby imparts a step by step feed movement to the ratchet wheel 53. Said wheel in turn rotates the roller 36 by which the wiping tape is fed over the die to remove the surplus wax.

Similar mechanism at the other side of the machine imparts the desired feed movement to the inking tape, such mechanism being shown in dotted lines in Figures 3' and 4.

It will be apparent that different dies may require a greater or lesser extent of feed. The variations in the feed of the wiping tape is obtained by providing the carrier 57 with an internally threaded bore through which is threaded a screw threaded'spindle 62, see Figure 2, to which is secured by means of a universal joint a hand wheel 63. By rotating the hand wheel the position of the carrier on the arms 58 can be altered. A corresponding adjustment is thereby made on the movement of the pawl 54 and the roller 33.

Similar means are provided to adjust the intermittent feed of the inking tape at the other side of the machine. 7

In view of the fact that the size of the die varies it is necessary that the inking and wiping tapes be brought into operation so as to contact only with the die and to'efiect this timing the two segments 59 and 50 are mounted on the end of the shaft 3 so that they can be adjusted relative to each other. When adjusted they are secured in their adjusted positions by means of cheese headed screws 63 see Figures 7 and 8, which pass through arcuate slots in, the cams segments and are threaded into internally tapped holes in the cam 5|.

The timing of the feed must be such that it takes place when the heating iron is in contact with the die, This also applies to the wiping tape. Such adjustment of the feed and wiping tapes is efiecting by making an appropriate adjustment in the position of the cams or inclined planes Bl with which co-operate the rollers 61]..

As clearly shown in Figure 7 one end of each of the cams or inclined planes 5! is pivotally secured to the cam section 58 at Bl while .the other end thereof is connected by .a pin and slot connection GP to the boss of the cam .segment 50. Consequently when the cam segments are adjustedasaforesaid to suit the dimensions of the die the cam or inclined plane 6| is automatically adjusted, the adjustment being such that the feed or" the inking and wiping will take place when such tapes contact with the dies.

When printing, with a small die the cam sections are adjusted nearer to each other so that the cams or inclined planes 6| are thereby caused to assume a more upright position and the feed movement imparted by the arms 50 is in consequence relatively quick. On the other hand, Where a large die is used the cam sections are moved apart and the cams or inclined planes 6| assume a near horizontal position so that the feed movement imparted to the tapes is more prolonged.

The formation, operation and timing of the various cams will be understood from the following description of the operation of the machine.

The'die is fitted to the diecarrier, the counter die fitted to the plate l6 carried by the work plate and the two heating elements are brought up to the desired temperature, that is to such a degree that the wax will be sufficiently softened to be applied to the die.

Assume the die and counter die are in the closed position as shown in Figures 1, 3 and 5. When this shaft i2 is rotated cam 20 moves the counter die carried to the open position. When this die is being so moved the springs 45 are placed under compression due to the rollers d2 travelling in the straight paths 53 and thereafter, first the inking iron 21 transfers the wax from the inking tape to the die and then the wiping tape follows to wipe or clean the die. Further rotation of the shaft I2 results in the inking iron and wiping roller being moved clear of the die, the latter moved to the shut position and the counter die moved to a corresponding position and forced hard against the die, it being understood that a sheet of paper has been introduced between the die and counter die.

The cams operating the die carrier, the counter die, the inking iron and the wiping roller will, of course, be of such contour and be so set to give the aforesaid timing of the movements.

The sheet of paper introduced between the die and counter die is thus die-stamp printed and as the colour medium is wax the stamping is dry so that the sheets can be stacked immediately.

We claim:

1. In a die stamp printing machine, the combination comprising means for holding a flat die, means for heating said die, means for carrying a counter die, means by which the die and counter die can be caused to register with each other and be thereafter moved to the open position, means to support a roll of wax carrying tape, means by which said tape is guided to the die, means to cause the said tape to bear on the die, when the die is in the open position, means to feed the tape when it bears on the die so that Wax is deposited in the recesses of the die, means to support a roll of die cleaning tape, means by which said tape is guided to the die, means to cause the cleaning tape to bear on the waxed die, and means to feed the cleaning tape when it bears on the die so that it removes all wax from the face thereof, the means controlling the wax carrying tape and the means controlling the cleaning tape being timed to function one after the other prior to the die and counter die being brought to register to die stamp print a paper introduced therebetween.

2. In a die stamp printing machine, the combination comprising means for holding a flat die, means for heating said die, means for carrying a counter die, means by which the die and counter die can be caused to register with each other and be thereafter moved to the open position, means to support a roll of Wax carrying tape, guide means by which said tape is guided to the die, a loaded member over which said tape is passed, means to support a roll of die cleaning tape, means to guide said tape to the die, a loaded member over which the die cleaning tape is passed, cam operated means to intermittently increase the loading on the loaded members, cam means to release said members so that first the wax carrying tape and thereafter the cleaning tape are pressed on the die, means to pull the tapes over the face of the die'when they are so pressed so that the recesses in the die are filled with wax and thereafter wax on the face of the die removed, the means controlling the wax applying tape and the cleaning tape being timed to function one after the other prior to the die and counter die being brought to register to die stamp a paper introduced therebetween, and means to move the loaded members clear of the die after the die has been cleaned and prior to the printing operation.

3. In a die stamp printing machine, the combination comprising means for holding a flat die, means for heating said die, means for carrying a counter die, means by which the die and counter die can be caused to register with each other and be thereafter'moved to the open position, means to support a roll of wax carrying tape, guide means by which said tape is guided to the die, a loaded member over which said tape is passed, means to support a roll of die cleaning tape, means to guide said tape to the die, a loaded member over which the die cleaning tape is passed, means for heating said member, cam operated means to intermittently increase the loading on the loaded members, cam means to release said members so that first the wax carrying tape and thereafter the cleaning tape are pressed on the die,,means to pull the tapes over the face of the die when they are so pressed, so that the recesses in the die are filled with wax and thereafter wax on the face of the die is removed, the means controlling the wax applying tape and the cleaning tape being timed to function one after the other prior to the die and counter die being brought to register to die stamp print a paper introduced therebetween, and means to move the loaded members clear of the die after the die has been cleaned and prior to the printing operation.

4. In a die stamping printing machine, the combination comprising means for holding a flat die, means for heating said die, means for carrying a counter die, means by which the die and counter die can be caused to register with each other and be thereafter moved to the open position, means to support a roll of wax carrying tape, guide means by which said tapeis guided to the die, a loaded member over which said tape is passed, means to support a roll of die cleaning tape, means to guide said tape to the die, a loaded member over which the die cleaning tape is passed, cam operated means to intermittently increase the loading on the spring loaded members, cam means to release said members so that first the wax carrying tape and thereafter the cleaning tape are pressed on the die, means to pull the tapes over the face of the die when they are so pressed, so that the recesses in the die are filled with wax and thereafter wax on the face of the die removed, means by which the extent to which the tapes are pulled over the die can be regulated, the means controlling the wax applying tape and the cleaning tape being timed to function one after the other prior to the die and counter die being brought to register to die stamp print a paper introduced therebetween, and Number means to move the loaded members clear of the 1,250,008 die after the die has been cleaned and prior to 1,410,826 the printing operation. 1,542,796 LEONARD PACKER. 1,651,928 GEORGE ERNEST PACKER. 1,87 4,427 1,911,592 REFERENCES CITED 2,029,646 The following references are of record in the 2,065,690 file of this patent: 10 2,356,951

UNITED STATES PATENTS Number Name Date Number 1,009,457 Nickel Nov. 21, 1911 20,823

Name Date Pierson Dec. 11, 1917 'Mascord Mar. 28, 1922 Mairesse June 16 1925 Moscini Dec. 6, 1927 Billings Aug. 30, 1932 Supligeau May 30, 1933 Welter Feb. 4, 1936 Gould Dec. 29, 1936 Runton Aug. 29, 1944 FOREIGN PATENTS Country Date Great Britain Oct. 10, 1914

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