US1985226A - Printing mechanism - Google Patents

Description

De 25, 1934- F. A. BEACH l v PRINTING MECHANISM Filed March y1s, 19'33 sheets-sheet 1 BEACH R O T ma N AmK m, m J m Y J ..r um, uw u O mv v Nm. v l \m v mm w o 1% m, v O m e n e Nw Nw uw s me 8% mm .WMS J mw afm I l 0, DN l V| n l Q Nuv|||\} UN W m QQ O s: W Il .0, a U\w\ C UQ hv wv f, QQ NQ f\\ mw mw S x w NN ov m @S ORNEYS.

Dec. 255 1934. F. A. BEACH f 1,935,225

y PRINTING MECHANISM v Filed March 13, 1933 2 sheets-sheet z INVENTR l FREDERICK A. BEACH 'rToRNEYsQv Patented Dec. 25, 1934 UNITED STATES PRINTING MEcnANisM Frederick A. Bleach, Metuchen, N. J., assigner to Joseph Rubenstein," Brooklyn, N. Y.

Application March 13,

12 Claims.

The present invention relates to improvements in printing mechanisms, particularly in those ofthe multigraphing type.

The general practice in printing with duplicating machines is to impart impressions of the charsary to replenish the ink content of the ribbon.

Attempts have been. made to do this without removing the ribbon from the machine by providing the machine with a reinking device comprising.

an ink fountain and rolls arranged to transfer the ink from the fountain to the ribbon while the machine is in operation. 'I'his device, however, has not been commercially successful. v This is due for the most part to the fact that the character of the ribbons used is such as to preclude a uniform transmission of the applied ink to all parts of the ribbon. As a consequence, those parts of the ribbon contacting the transfer roller of the reinking device become supersaturated with ink and when the type is impressed on the paper through these portions of the ribbon, the surplus ink causes runs between the type producing smeary and smudgy prints on the paper.

Workers in this art, therefore, in order to secure Asatisfactory prints have beenforced, when the` ribbons became depleted in ink, to remove theribbons from the machines and replace them with new ribbons properly saturated with ink. This procedure is very similar to that employed to replace worn out ribbons in typewriters. Needless to say, this procedure besides being expensive is rather annoying and consequently objectionable from a commercialstandpoint.

The present invention contemplates an improvement for overcoming the above objections comprising a wiping attachment for the transfer ribbon which permits reinking of the ribbonl during operation of the machine by ensuring a removal of surplus ink and a uniform distribution of the ink throughout the ribbon.

It is accordingly an object of this invention to provide a process for effecting a uniform dist-ribution of ink in a transfer ribbon of a printing 193s, serial No. 660,509

(ci. 10i-336) for removing surplus ink supplied during reinking of the ribbon.

Reference is now made to the accompanying drawings of which Fig. 1 is a perspective view of a multigraphing machine in which my improvements are embodied.

Fig. 2 is a plan view of the ribbon wiper.

Fig. 3 isa section on line 3--3 of Fig. 2.

Fig. 4 is a diagrammatic view of a conventiona ribbon inking device. On the drawings:

The printing device disclosed in toto in Fig. 1 comprises a paper feeding section 1 and a printing section 2 -mounted respectively on the sup.-

porting frames 3 and.3a which are secured together vby fastening devices (not shown).

The printing mechanism 4a of the printing section is of conventional structure including as it does the usual printing cylinder 4, cylinder supports 5 providing the journals 5a, transfer ribbon 6 and platen not shown). The cylinder is rotated by a4 motor 7 through suitable driving connections although rotation may be effected by the handle 1a if desired. Ink is supplied to the transfer ribbon through an inking attachment 8 of ordinary construction (Fig. 4) cornposed of an ink fountain 8a, transfer rolls ll and intermediate rolls 9 and 10 operable in the manner shown in said gure. It will be appreciated that these printing parts lare embodied in the general run of duplicating machines and constitute no part of this invention.

The ink supplied to the. ribbon 6 by the transfer rolls 11 is distributed through the ribbon and excess ink removed from the ribbon by means of the ribbon wiper 12'shoWn in detailI in Figs. 2 and.3. Said wiper 12 as will be perceived from Fig. l, is secured to a rearwardly extending projection 14 of the supports 5 in a position to contact the ribbon 6 directly after the ribbon has had wiping contact with the transfer rolls l1.

The wiper 12 comprises a flat base 15 of wood or the like possessing narrow lateral extensions 16. The base 15 is secured in a metal pan l'l having a flat bottomy 18, and vertical front and rear portions 19 and 20 of about the same height as.the thickness of the base. Vertical wings 21 are formed on the lateral edges of lthe pan in front of the extensions 16 of the base l5. The

pan also has lateral extensions22, underlying and secured to the extensions 16 of the base 15. The

rear edges 23 of said extensions are upturned along the rear of said extensions 16. Hinge sections 24 comprising pintle bearings 24a and hinge plates 2412 are provided for securing said-Wiper to tension 16. vA thick padding 28 of absorbent material such the printing mechanism. It vwill be` observed from a reference to Fig. 3 that said plates 24h extend below the level of the bottom of the wiper. Each of said hinge sections 24 is joined by a pintle 25 with a hinge section 26 rigidly secured as by screws 27 to the upper face of a base ex- The wings of the metal pan provide Journals for a pair of spaced shafts 33 and34, one end of' which is provided with headed members 35, such as wing nuts, rigid therewith. I'he other end of the shafts is reduced in size and threaded for the reception of removable wing nuts 36, which can be turned up on the shafts to lock the same in place. The absorbent layer 29 is covered by a protectingstrip of muslin or the like'37 the ends of which are securely fastened to shafts 33 and 34. Said strip has a width substantially equal to that of the layer 29 but has a relatively great length. As will be noted, said strip passes from shaft 33, about the layer 29 and thence to shaft 34. The movement of the strip is caused by turning the shafts 33 and 34, after release of nuts 36, which effects unreeling of the muslin from one shaft and a reeling up of the muslin on the'other shaft.

.7d always clear and distinct.

The wiper when in use is attached to the projection 14 of the supports 5 at a point slightly above and to the rear of the central axis of the printingl cylinder by means of a rigid connection 13 between the hinge plates 24h and said proljection. Due to the location of the hinge pintle 25 with respect to the point of connection 13 it will be apparent that the wiper will tilt forward under the urge of' gravity and rest against the surface of the .printing cylinder. lIn order to properly adjust the pressure of the wiper against the cylinder, one extension of the base 15 is provided with a headed set screw 38 the lower end of which is adapted to bear against the top of the supports 5. Rotation of the screw causes a lowering or raising of the wiper as the case may be and consequently a change in the force with which the wiper acts on the printing cylinder.

The operation of the wiper is apparent from the foregoing structure. Ink is continuously sup# plied `to the ribbon 6 by the reinking arrangement'8 which applies the ink to the ribbon at spaced points belowthe wiper. Rotation of the cylinder causes the reinked portions of the ribbon to pass beneath the absorbent surface of the wiper which acting directly against the ribbon absorbs surplus ink and effects a distribution of thel ink through the ribbon. In this way theprinting is always effected upon a properly inked ribbon and consequently the prints obtained are Whenever the muslin surface arranged over the bottom of the wiper becomes worn, a fresh surface is provided, by rotating the shafts 33 and 34 as before explained. I claim- 1. The process for reinking the transfer rib- 75 bon of a duplicating machine in which the ribbon ,is carried by a rotatable printing roll, which ccmprises applying ink to the ribbon at one point in the VLrotation of the roll and removing surplus ink from said ribbon at another point in the rotation of said roll priorto the printing step.

2. The process for reinking a transfer ribbon of a printing machine while the machine is in operation which comprises applying ink to one surface of the ribbon and wiping surplus ink from said surface prior to the printing step at a point spaced from the point of application of the ink.

3. The process for reinking a transfer ribbon of a printingmachine while the machine is in operation, which comprises applying'ink to the ribbon and wiping the ribbon and absorbing surplus ink therefrom prior to the printing step at a point spaced'froni the point of application of the ink.

4. In combination with the transfer ribbon of a duplicating machine, means for applying ink to one surface of the ribbon while the machine is in operation, and means adapted to bear against this surface of the ribbon at a point removed from the point of application of v'the ink to remove surplus ink from the ribbon.

5. The process for reinking a transfer ribbon of a printing machine while the machine is in operation, which comprises applying ink to one surface of the ribbon and removing surplus ink from said surface prior to the printing step by subjecting the entire width of said surface to a simultaneous wiping and vink absorbing treatment at a point spaced from the point of application of the ink.

6. In combination with the transfer ribbon of a duplicating machine, means for applying ink to the ribbon while the machine is in operation,

and means comprising a wiper having a at base covered by ink absorbent material adapted to bear against the ribbon at a point removed from the point of application of-the lnk to remove surplus ink from the ribbon.'

7. The process for reinlcing a transfer ribbon of a duplicating machineV whileY the machine is in operation, which comprises applying ink to one surface of the ribbon and removing surplus ink from said surface prior to the printing step.

said wiper comprismg a basehaving a flat bottom, absorbent material secured over said bottom and means for protectngsaid absorbent material from the friction set Vup during wiping.

9. A device as dened in claim 8 wherein said wiper includes means for varying the pressure 'of the wiper on said transfer ribbon.

10. In combination with the transfer ribbon of a duplicating machine, means for applying ink to the ribbon while the machine is in opera- 'I tion and a wiper adapted to bear against the ribbon at a point removed froml the point of application of the ink to remove sin-plus ink from the ribbon; said wiper comprising a base having a flat bottom, absorbeirmaterial secured over said bottom and a fibrous strip movable over said absorbent'material for protecting said material from the friction set up during wiping.V

11. In combination with the transfer ribbon of a duplicating machine, means for applying ink to the ribbon while the machine is in operation and a wiper adapted to bear against the ribbon -at a point removed from the point of' 'application of the ink to remove surplus ink from the ribbon, said wiper comprising a base having a iiat bottom, absorbent material secured over said bottom, a pair of shafts journalled to said base, a strip of brous material having its ends secured to said shafts and trained about said absorbent material, and means for rotating said shafts to move said iibrous material.

12. A wiping attachment for removing surplus ink from the transfer ribbon of a duplicating machine, comprising a wooden base having a ends secured to said shafts and trained about said absorbent material, means for looking said shafts against rotation, means for rotating said shafts to cause diiierent portions of said iibrous material to overlie said absorbent material and means for securing said attachment to the duplicating machine so as to bear against theltransfer ribbon thereof.

FREDERICK A. BEACH.

Y dat bottom, a metal pan disposed overland se-

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