US1409743A - Flat-bed printing press - Google Patents

Description

1. Mumia. FLAT BED PRINTING PRESS. APPLICATION FILED-IAN. 8. IQZI. 1,409,7 43. Patented Mar. 14,1922.

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UNITED STATES PATENT OFFICE.

JOHN WILLIAM LITTLER, OF BROADHEATH, ENGLAND, ASSIGNOR TO LINOTYIE AND MACHINERY LIMITED, OF LONDON7 ENGLAND.

FLAT-BED PRINTING PRESS.

Specification of Letters Patent.

Patented Mar. 14, 1922.

Application filed January 8, 1921. Serial No. 435,789.

To all whom it may concern y Be it known that I, Jol-1N lViLLrAM LrrrLnn, a subject of the King of the United Kingdom of Great Britain and Ireland, and residing at Linotype and B'Iachinery IVOrkS, Broadheath, in the county of Chester, England, have invented new and useful Improvements 'in Flat-Bed Printing Presses, of which the following is a specification.

This invention relates to flat bed printing presses, and has for its object to provide an improved construction of the known type in which the bearers in such presses fulfil the dual capacity of bearers and side bars so as to dispense entirely with the separate side bars which' are generally employed and to a corresponding extent serve for increasing the space available for receiving the form.

The invention will now be described by reference to the accompanying drawings, in which Figure 1 is a plan, partly broken away, of a type bed fitted with the improved bearers and cross-bars;

Figure 2 is a Vfront elevation of the arrangement shown-in Figure l, and

Figure 3 'is a section on the line 3 3 of Figure l, drawn to a. larger scale than that figure.

According to the present invention, the cylinder bearers 2, 3 secured to the type bed l are provided with recesses et, 5 respectively to enable them to serve as side bars for the locking up ofthe' form. The recesses 4, 5 are formed, as shown best in Figure B, with inwardly facing mouths, so that the tops or tracks of the bearers 2, 3, present the usual uninterrupted surfaces and also prevent the cross-bars 6, 7, from working out upwardly. The ends of the cross-bars 6, 7, are bevelled as shown to .permit of their readily enteringvthe recesses 4, 5, .when the bars are moved longitudinally, and the recesses in one of the bearers, say the recesses 5 in the so-called gear side bearer 3, are deeper than are the corresponding recesses l in the opposite or feeder side bearer 2, to allow of the just-named longitudinal movement for the disengagement of the respective cross-bar first from one and then from the other of the two recesses with which it is vengaged and reversely for the engagement of the said bar therewith. In the example illustrated, the rear cross-bar 7, being wider than the recesses 4, 5, engages the latter by projections at its ends, the projection on the end adjacent to the deeper recess 5 being longer than that at the opposite end, to permitgof the endwise engaging and disengaging movement of the said bar.

For the purpose of securing the crossbars 6, 7 in position for locking up a form, each has pivoted to it, as by a shouldered screw 9, a catchor stop 8 in such a position that it may be engaged with the respective bearer as shown 'in the drawing in full lines to prevent endwise movement of the respective cross-bar, or turned on its pivot to the position in which it is shown in dot-and-dash lines in Figure 2te permit the removal of the bar. The inner ends of the catches 8 may be conveniently provided with tails bevelled as shown in Figures 2 and 3 to limit their pivotal movement when the cross-bars 6, 'T are in position on the type bed l.

The cross-bar 6 at the front edge of the type bed l is preferably provided on one of its edges with inclined surfaces 1l which, when the bar is used-in the position illustrated in Figure l, that is to say with the said inclined surfaces presented towards the cross-bar '7, serve as wedge surfaces for locking up the form when the klocking-up furniture used consists of wooden wedges, or quoins. IVhere, however, expansible metal vquoins are employed for locking up the form, such wedge surfaces are not required and the bar 6 may then be reversed end for end so as to present its straight edge inwards. In order that the cross-baro may be locked when in the lastnamed reversed position a tapped hole 10 may be provided in a convenient position on the appropriate inclined vsurface Il so that the catch 8 may be readily attached to that edge of the bar Awhen required.

It is to be understoodvthat the precise construction herein described and illustrated in the accompanying drawings is given merely as an example, and may be varied within the scope of the invention.

I-Iaving described my invention, I declare that what I claim and desire to secure by Letters Patent is l. In a flat bed printing press, the combination with the bed of cylinder bearers provided with recesses adapted to accom-- modate the ends of cross-bars for locking up the forni with a. capacity for endWise movement of the crossbars in such recesses.

2. In a fiat bed printing press, the combination With the bed and a cylinder bearer on each side thereof, of oppositely-located recesses in the respective bearers, cross-bars adapted to engage said recesses With a capacity for endivise movement in the latter, and means adapted to lock said cross-bars against endvvise-movement when so engaged.

3. In a flat bed printing press, the combination With the bed and a cylinder bearer on each side thereof, of a series of recesses in one of the bearers, a corresponding series of deeper recesses in the other bearer, and cross-bars adapted to be engaged with and disengaged from oppositely-located pairs of Ysuch recesses by endvvise movement relatively thereto.

4C. In a flat bed printing press, the combination with the bed and a cylinder bearer on each side thereof, of a series of recesses in one of the bearers, a corresponding series of deeper recesses in the other bearer, crossbars adapted to be engaged with and disengaged from oppositely-located pairs of such recesses by endwise movementY relatively thereto and means adapted to lock said cross-bars against endWise movement when so engaged.

5. In a fiat bed printing press, the combination With the bed and a cylinder bearer on each side thereof forming an uninterrupted track for the cylinder, of oppositely-located inwardly-opening recesses in the respective bearers, and cross-bars adapted to engage said recesses with a capacity for endwise movement in the latter.

6. In a flat bed printing` press, the combination with the bed and a cylinder bearer on each sidey thereof forming an uninterrupted traclr for the cylinder, Vof a series of inwardly-opening recesses in one of the bearers, a Correspending` series of deeper in- Wardly-opening recesses in the otherbearer, and cross-bars adapted to be engaged With and disengaged from oppositely-located pairs of such recesses by endwise movement relatively thereto.

7. In a flat bed printing press, the combination With the bed and a cylinder bearer on each side thereof forming an uninterrupted track for the cylinder, of a series of inwardly-opening recesses in one of the bearers, a corresponding series of deeper inwardly-opening recesses in the other bearer, cross-bars adapted to be engaged with and disengaged from oppositely-located pairs of such recesses by endwise movement relatively thereto, and means adapted to lock said cross-bars against endwise movement when so engaged.

8. In a flat bed printing press, the combination With the bed and a cylinder bearer on each side thereof, forming an uninterrupted track for the cylinder, of oppositelylocated inwardly-opening recesses in the respective bearers, cross-bars adapted to engage said recesses With a capacity for end- Wise movement in the latter, and means adapted to lock said cross-bars against end- Wise movement when so engaged.

9. In a fiat bed printing press, the combination With the bed and a cylinder bearer on each side thereof, of oppositely-located recesses in the respective bearers, cross-bars adapted to engage said recesses, and a pivoted catch on each cross-bar adapted to engage With a` bearer to prevent endWise movement of the respective bar When so engaged.

l0. In a fiat bed printing press, the combination With the bed and a cylinder bearer on each side thereof, of a series of recesses in one of the bearers, a corrresponding series of deeper recesses. in the other bearer, crossbars adapted to be engaged With and disengaged from oppositely-located pairs of such recesses by endWise movement relatively thereto, and a pivoted catch on each crossbar adapted to engage With a bearer to pre vent endvvise movement of the respective bar When so engaged.

Il. In a flat bed printing press, the combination with the bed and a cylinder bearer on each side thereof, forming an uninterrupted track for the cylinder, of a series of inwardly-opening recesses in one of the bearers, a corresponding series of deeper inwardly-opening recesses in the other bearer, cross-bars adapted to be engaged with and disengaged from oppositely-located pairs of such `recesses byk endvvise movement relatively thereto, and a pivoted catch on each cross-bar adapted to engage Witha bearer to prevent endwise movement of the respective bar when so engaged.VV

l2. In a Hat bed printing press, the combination with the bed and a cylinder-.bearer on each side thereof' forming annninter rupted track for the cylinder, of oppositely-V located inwardly-opening recesses in the respective bearers, cross-bars adapted to en gage said recesses, and a pivoted catch on each cross-bar adatped to engage with a bearer to prevent endwise movement of the respective bar when so engaged.

13. In a fiat bed printing press, the combination Witha bed and a cylinder bearer on each-side thereof, of oppositely-located recesses in the respective bearers, a cross-bar adapted to engage said recesses and having inclined surfaceson one edge and a fiat surface on the other, a pivoted catch on the cross-bar adapted to engage with a bearer to prevent endwise movement of the bar when the latter is engaged With the recesses, and means adapted to secure the pivoted catch to either edge of the cross-bar for the purpose specified.

le. In a fiat hed printing` press, the combination with the hed and a cylinder bearer on each side thereof, of a series of recesses in one of the bearers, a corresponding series of deeper recesses in the other bearer, a cross-bar having inclined surfaces on one edge and a lat surface on the other and adapted to be engaged Wit-h and disengaged Yfrom oppositely-loeated pairs of said recesses by endivise movement relatively thereto, a pivoted catch on the cross-har adapted to engage with a bearer to prevent such movement of the bar when the latter is engaged With the recesses, and means adapted to secure the pivoted catch to either edge of the cross-bar for the purpose specified.

l5. In a fiat bed printing prese the coinbination with the bed and a cylinder bearer on each side thereof, forming an uninterrupted track for the cylinder, of a series of inwardly-opening recesses in one of the bearers, a corresponding series of deeper inwardly-opening recesses in the other bearer, a cross-bar having inclined surfaces on one edge and a flat surface on the other and adapted to be engaged with and disengaged from oppositely-located pairs of said recesses by endwise movement relatively thereto, a pivoted catch on the cross-bar adapted to engage with a bearer to prevent such movement of the bar when the later is engaged with the recesses, and means adapted to secure the pivoted catch to either edge of the cross-bar for the purpose specified.

In testimony whereof I have aixed my signature hereto.

JOHN WILLIAM LITTLER.

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