US981346A - Press for embossed printing. - Google Patents

Description

'15. W. WOOD.

PREss FOR EMBOSSED PRINTING.

APPLICATION FILED JUNE 25, 1909.

981,346. Patented Jan. 10, 1911.

2 SHEETS-SHEET 1.

Y F. W. 001). PRESS FOR EMBOSSED PRINTING.

APPLIUATION'IILED JUNE 25, 1909.

TH: NORRIS pzrzns co.. wnsnmcmn, 11. c4

FREDERICK WILLIAM WOOD, OF LONDON,

ENGLAND, ASSIGNOR TO LINOTYPE AND MACHINERY LIMITED, OF LONDON, ENGLAND.

PRESS FOR EMBOSSED PRINTING.

Specification of Letters Patent.

Patented Jan. 10, 1911.

Application filed June 25, 1909. Serial No. 504,291.

To all whom it may concern:

Be it known that I, FREDERICK WILLIAM Woon, a subject of the King of the United Kingdom of Great Britain and Ireland, and

residing at 188 and 189 Fleet street, in the England, have invented caused to travel first over a device from E which 1t receives 1ts charge of ink, and then 1 over another device which wipes its under:

' the pressure of the pad 20, having been resurface to remove the superfluous ink therefrom, and in which it is thereafter brought beneath a springor equivalently depressed plunger which when released and allowed;

to descend, causes the impression to be made; after the blow is struck, the plunger is raised to and locked in, its highest position ready for its next release for making the next embossing stroke.

A press of the just mentioned type is fully described in the specification forming part of Letters Patent No. 677223 dated June 25th, 1901, and it is to that particular construction of press that the present improvements are applicable, the object of this invention being to provide means for en abling the operator, while stationed at the. front of the press, to exercise more ehicient control thereover, than has hitherto beenpossible with presses of the same type.

In the accompanying drawings which are to be taken as part of this specification and read therewith :-Figure 1 is a perspective view of sufficient of a press to show the application thereto of the present improvements; Fig. 2 is an elevation, as seen from the right-hand side of the press, showing;

the wiping-paper feed mechanism, which latter is represented as partly broken away; 3 Fig. 3 is a front elevation of part of thepress showing means according to these im- 2 provements controllable by the operator for arresting the descent of the die; Fig. 4 is.' an elevation and Fig. 5 a vertical section about on the line 7-7 of Fig. 4, of part of the mechanism shown in Fig. 5; and Fig. 6 is a diagrammatic section taken about on the line 8-8 of Fig. 3, illustrating certain;

parts of the mechanism for raising, locking and releasing the press plunger.

It is sometimes found necessary to feed the wiping paper 19, (shown in dot-anddash lines in Fig. 2) onward while the press is not at Work, and for this purpose the operator has hitherto been compelled to leave his position at the front of the press, remove the pressure pad out of contact with the wiping paper, and then, from a position difiicult of access at the back of the press, turn, by hand, the feed roller 21 and take-up or receiving roller 22, all of which absorbs a considerable amount of time and moreover is responsible for loss of ink because moved from the back of the paper 19, the scraping knife 23 cannot efficiently scrape the ink from the paper then moved past it.

The feed roller 21 which cooperates with the before-mentioned feed roller 21 and the take-up roller 22, during the normal working of the press, of a vertically reciprocated rack bar 24, which, as ordinarily, is depressed by a cam (not shown in the drawings) and raised by a spring 25 and which rack bar, as usual, imparts rotary motion to the rollers 21 and 22 through the ratchet devices 26, 27 respectively; it is this said rack bar 24, which, according to the present invention is utilized for operating the rollers 21, 22 at the will of the operator. rack bar 24 is adapted to be depressed by a foot lever 28 pivoted at its rear end to a fixed bracket 29 and having its forward end situated so as to be convenient for de- For this purpose the are caused to rotate by means pression by the foot of the operator when stationed at the front of the press. The engagement of the lever 28 with the rack bar 24 may be by way of a pawl pivoted on the former engaging a tooth or recess on the latter, or preferably, as shown in Figs. 1 and 2,

During the normal working of the press,

the rack bar 24 fulfils its ordinary function, and during the non-working of the press the said rack bar, when desired, is caused to effect the same operation by the depression of the foot lever 28, and this without the pressure pad 20and consequently the efliciency of the ink scraper 23- being interfered with in any way.

In the case of failure to feed a sheet into the position in which it receives the impression, and for other reasons, it, sometimes, becomes necessary to prevent the descent of the die so as to avoid the inking of the counterpart and possibly injury to the press or operator. The only provision which has heretofore been made for dealing with such con- 'tingencies is the ordinary clutch lever 48 by means of which the operation of the press, as a whole is arrested, but these means cannot be depended upon for preventing the descent of the die-depressing plunger unless the said clutch lever is actuated considerably in advance of the time at which such descent is due. As, however, the necessity for preventing the descent of the plunger is sometimes not recognized until the latter is just about to descend, many attempts to prevent this descent by means of the clutch lever, v prove futile. According to the present invention this difficulty is entirely overcome by means of a manually controllable pawl 33.

which is additional to the pawls 55 described in the before mentioned specification of Letters Patent No. 677223, and one of which pawls 55 is shown in Fig. 1, the said pawl 33 being adapted to engage with one of the Z racks 50 with which the pawls 55 engage. This additional pawl 33 is free to turn upon I a stationary stud 34 fast in a yoke or bracket 35 rigidly secured to the drumhead casing 36. The pawl 33 is held in either its effec v tive or ineffective position by a spring 37 at tached at its upper end to the said pawl and at its lower end to a pin 38 fast to an arm 39 pivoted on the stud 34. The pin 38 engages with a slot 40 in one arm of a bellcrank lever 41 pivoted at 42 to the yoke or bracket 35, and the other arm of which isv connected through a link 4-3 with a hand lever 44 pivoted'at 45 to the main frame of the press.

the pull of the spring 37, held out of the.

path of the appropriate rack 50, and when the said hand lever is in the lower position in which it is shown in full lines in Fig. 3, and, in consequence thereof, the arm 39 is situated at an angle to the pawl 33 also as shown in full lines in Figs. 3 and 4, the said pawl, by the pull of the spring 37, is held in the path of the rack 50 and thereby capable of engaging with the latter and preventing the descent of the die-depressing plunger 46 Fig. 1. i

As described in the specification of the before mentioned Letters Patent the plunger 46 is screw-threaded and threaded through a nut, its ascent and descent being effected by turning it about its axis in respectively opposite directions. The rotation of the plunger 46 in the direction necessary for effecting its ascent, is effected by the devices shown in the accompanying Fig. 8 which is practically identical with Fig. 15 of the drawings of the before mentioned Letters Patent. cured on the plunger 46, within the drumhead casing 36, an arm 51 adapted to move with the plunger throughout its entire angular motion and having pivoted to its free or outer end a connector or link 52 which is furnished with a drag roller 53, a locking roller 54 and a larger or cam roller 155, the three rollers being arranged triangularwise.

Secured upon a ledge within the casing 36 In this arrangement there is sei is a guide 56 and upon the plunger 46 there forward edge comes into contact with the drag-roller 53, and so drags along with it the link 52,wh1ch, through the arm 51,turns the plunger 46 about its axis in the direction which causes it to ascend and the springs 59 to be compressed. At or about the termination of this same rotation of the cam-arm 57, the roller 155 comes into contact with a fixed cam plate 60 which causes the free end of the link 52 to be deflected outward so as to cause the locking roller 54 to roll into a recess 61 formed in the end of the guide 56, and the drag roller 53 to be disengaged from the cam-arm 57, the formation of the recess 61 being such that the locking roller 54 is retained therein after the cam-arm 57 has passed out of contact with the roller 53. The

plunger 46 is thus locked in its raised posi- VVhen the hand lever 44 is in its ralsed or tion, with the springs 59 compressed and ready to rotate the plunger in the direction necessary for causing it to give the impression blow.

The release of the plunger 46 is effected by the cam or tripping piece 58 coming into operative contact with the outer side of the cam roller 155 and thereby drawing the locking roller 54 inward out of the recess 61 and thus allowing the springs 59 to turn the plunger and force it downwarch Consequent upon the force of the impact the plunger 46 rebounds and in doing so the teeth of the racks 50 slip over the respective pawls 55 which, at the termination of such rebound, engage with the said racks and maintain the plunger in its partially raised position, the completion of the plungers ascent being effected by the devices hereinbet'ore described and shown in Fig. 8.

The pawl 33 is so situated that it will allow the appropriate rack to return to the extent of about half the length of one of its teeth, after the said rack has reached the limit of its upward stroke, this provision being desirable in order that at such extreme limit the pressure may be removed from the pawl 33 to enable the latter to be easily lowered by the operator out of the path of the said rack for allowing the plunger -16 to be again depressed. Suitable means may be provided for temporarily retaining the hand lever a l in either of its two terminal positions, for example, a plunger or projection may be provided on the hand lever 4L4, adapted to engage with depressions on a stationary sector 47.

I claim 1. In a press for embossed printing, the combination with a plunger adapted to deliver the embossing blow, a spring adapted to cause the plunger to deliver the said blow, means adapted to automatically raise the plunger against the action of the spring and to arrest the plunger in its elevated position, and a device adapted to automatically release the plunger, of means under the control of the operator adapted to arrest the descent of the plunger after it has been re leased by the automatic arresting means.

2. In a press for embossed printing, the combination with a plunger adapted to deliver the embossing blow, a spring adapted to cause the plunger to deliver the said blow, means adapted to automatically raise the plunger against the action of the spring and to automatically arrest it in its elevated position, a device adapted to automatically release the plunger, and racks and a pawl device adapted to automatically arrest the plunger after its rebound, of a pawl adapted to be moved by the operator into operative relationship to one of the racks for the purpose of arresting the descent of the plunger after the latter has been released from the control of the automatic arresting means 3. In a press for embossed printing, the combination with a plunger adapted to deliver the embossing blow, power means adapted to cause the plunger to deliver the said blow, means adapted to automatically raise the plunger against the action of the power means and to arrest it in its elevated position, a device adapted to automatically release the plunger, racks and a pawl device adapted to automatically arrest the plunger after its rebound, and a pawl adapted to be moved into and out of operative relationship to one of the racks, of a spring in operative connection with the pawl adapted to hold it in the said relationship, and devices at the front of the press operatively connected with the pawl whereby the operator can move the said pawl into and out of the said relationship.

a. In a press for embossed printing, the combination with a plunger adapted to deliver the embossing blow, power means adapted to cause the plunger to deliver the said blow, means adapted to automatically raise the plunger against the action of the power means and to arrest it in its elevated position, a device adapted to automatically release the plunger, racks, and a pawl device adapted to automatically arrest the plunger after its rebound, and a pawl adapted to be moved into and out of operative relationship to one of the racks, of a pivot for the pawl, an arm pivoted and capable of angular movement on the said pivot, a spring in operative connection at one end with the pawl and at the other end with the free end of the arm, and devices at the front of the press operatively connected with the arm whereby the operator can turn the latter on the pivot independently of the pawl.

In witness whereof I have hereunto set my hand in the presence of two witnesses.

FREDERICK WILLIAM WVOOD. IVitnesses:

F. A. Guano, VVARwIcK HY. IVILLIAMS.

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