US396896A

US396896A - Sheet-delivery apparatus for printing-machines

Info

Publication number: US396896A
Authority: US
Publication date: 1889-01-29
Anticipated expiration: 1906-01-29

Description

2 Sheets-Sheet 1.

NO Model.)

W. SCOTT. SHEET DELIVERY APPARATUS FOR PRINTING MAoEIIIEs. No. 396,896.

Patented Jan. 29, 1889.

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(No Model.) 2 Sheets-Sheet 2 W. SCOTT. SHEET DELIVERY APPARATUS FOR PRINTING MAGHINES. No. 396,896. Patented Jan. 29, 1889.

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UNITED STATES PATENT OFFICE.

\VALTER SCOTT, 0F PLAINFIEIAD, NE\V JERSEY.

SHEET-DELIVERY APPARATUS FOR PRINTING MACHINES.

SPECIFICATION forming part of Letters Patent No. 396,896, dated January 29, 1889.

Application filed March 2, 1888. Serial No. 265,921. (No model.)

To all whom it may concern.-

Be it known that I, WALTER Sco'r'r, of Plain'field, in the county of Union and State of New Jersey, have invented an Improvement in Sheet-Delivery Apparatus for Printing-Machin es, of which the following is a specification.

This invention applies to that class of printing-machines in which two sheets are printed at each rotation of the type-cylinder, and such sheets are out apart and one sheet laid upon the other previous to the folding operation being performed.

In my presentimprovements the sheets are printed and cut as usual, and then they are com'eyed away by tapes, two sheets being carried to one folding apparatus, and then the next two sheets are carried to the other folding apparatus, so that the necessary time elapses between the delivery of the pairs of sheets for the respective folding operations to be performed. \Vhere one sheet is carried forward over the folding-rollers and beneath. the folding-blade, difficulty has been experienced in introdueii'ig the next sheet, because the rear end of the first sheet liable to catch the advancing end of the second sheet. In my present improvements the sheets are delivered over a roller or bar and pass along to place for folding upon tapes or rods, and as the rear end of the first sheet passes clear of the roller or bar depressing-fingers are made to act upon the rear end of such sheet to carry it down below the path of the advancing end of the next sheet, and the movement given to these fingers is instantaneous, so that the fingers are not in the way of the front end of the next sheet.

In the drawings, Figure 1 is a diagrammatic View representing the cutting-cylinders, conveying belts or tapes, and portions of the folding devices. Fig. 2 illustrates the gearing that may be made use of for giving motion to the respective parts, and Fig. is a detached view of part of the blade forming the fingers 53. V

The cutting-cylilulers A and B are of ordi nary construction, and they are usually half the diameter of the type and impression cyl' inders, so as to make two revolutions and out the web into two sheets for each complete impression. The tapes or bolts 2 and 3 are for conveying away the printed sheets. These tapes pass around rollers, as usual, to convey the sheets to the respective points of delivery, the tapes or belts 2 passing around the rollers 4, 5, 6, 7, 8, 0, 10, and 1l,the rollers 10 and'll being fitted, as usual, upon arms, so as to tighten the belts from time to time, and the tapes or belts 3 pass around the rollers 12 13 ll 15 l6 l7 7 (3 5, the rollers 15 being upon arms for tightening this range of belts 3.

It will be apparent that the tapes 2 and 3 pass together over the roller 5, and at this point the sheetis nipped, and the belts, travelin faster than the periphery of the euttii'igcylinders, pull. the one sheet away from the next, so as to separate and accelerate the sheets in succession, and such belts also pass together around the roller 6 and up to the roller 7, and above this roller 7 is a switch, D, upon the cross-rod or rock-shaft 20, which is moved periodically by a cam, E, and roller 21, so as to allow the sheets to pass around the roller 7 upon, thebelts 2 and below the roller 8 and overthe folding-roller 1 or else, when the switch I) is in the position shown by dotted lines, the sheets are carried up by the belts 3 over the roller 17 and along by the belts 25 over the folding-rollers G. These belts 25 pass around the rollers 17 and along parallel to the folding-rollers G and around the pulleys 2G, and there are also bolts 27 passing around the rollers 16 and 30 to aid in conveying the sheets to the folding-rollers G.

It is to be understood that the respective rollers 7 Ill 17 are made of pulleys, so as to allow for the movements of the switch D and for the separate sets of belts as they pass ot't' in dilterent directions from one roller. I also make use of the sets of belts or tapes 32 passing around the rollers and moving parallel, or nearly so, to the belt 2, where it passes from the roller 9 to the rollers S and 10, respectively, and I employ another set of belts, 35, passing around the rollers 3i 8 36 37, so as to travel adjacent to the belts 2 between the rollers 7 S Ei-l.

The cam E acts upon the switch D in such a manner that. two sheets are allowed to pass around the roller 7,beneath the rollers 8 and 34, and over the folding-rollers F, and stop against the :fence 40, and the next two sheets are carried up over the switch D to the roller 17 and pass between the belts 3 and 25 to the roller 10, and thence between 25 and 27 along over the roller G to the fence 41.

The special feature of my present improvement relates to the cross-bar or roller 50 and the range of bars or guides 51, that slope up to the same, so that the sheets as they pass along successively between the ranges of tapes 25 and 27 pass over the bars 51 and across the roller or bar-50, and adjacent to this roller or bar 50 are the reciprocating fingers or blades 53, actuated by cams 54, that move the rollers and vertical slides 55, the said fingers or blades 53 being upon the cross-bar between the vertical slides 55, and the parts are so timed that at the moment the rear end of the first sheet pa over the cross-bar or roller 50 the fingers 53 are brought down upon the same to force the rear end of the sheet down below the top of this cross-bar or roller 50, and then these fingers 53 are instantly raised up again, so that the advai'icing end ofthe next sheet is free to pass under such fingers 53 and over the first sheet as it lies upon the tapes 25 with its front end against the fence or gage 41. In this manner I am able to pass one sheet over the other reliably, and to prevent the rear end of the first sheet interfering with the forward end of the second sheet, and there is a free space between the under side of the tapes 27 and the first sheet, as such first sheet lies upon the belts or tapes 25 and the rollers G, so that the second sheet is uninterrupted in its movement, and after it arrives at the fence or gage 41 the foldingblade is brought down to press the sheets in between the rollers G and fold the sameyas usual in folding machines. Precisely the same operation takes place upon the two sheets that are carried away between the belts or

tapes

2 and 32. The roller or crossbar is above the folding'rollers F and between the

tapes

2 and 32, and the inclined bars or guides (31 serve to elevate the sheet and carry it over the cross-bar (30, and the fingers or blades (33 act upon the rear end of the first sheet to press the same down adjacent to the cross-bar (30 and allow space for the advancing end of the second sheet, and the cam Get. gi vesnmti on to the slide I35 and the cross-piece carrying the fingers or blades 63.

It is preferable to make use of plates snitably notched at the places where the belts or tapes come in the respective ranges of belts to form the fingers or blades 53 (33, so that the paper will be acted upon uniformly through-. out its width, except at the places occupied by the tapes.

It will be understood that the printingcylinders may contain more than two sets of plates or printing-surfaces, and that the switch D may be moved and timed so as to pass all the sheets cut off that form one signature to one set of fold-ing-rolls, and then all the sheets that form the next signature to the other set of folding-rolls. a i

' hen the .machine is not running at a high rate of speed, the sheets will descend sufficiently fast by gravity for the second sheet to be run in over the first without using the fingers 53; or a puff of air from a perforated pipe maybe used in place of the fingers 53.

It will be apparent that the belts or tapes 3 may extend along and around the roll 30 in place of the separate belts 27, and that the belts may extend along to and around the roll 33 inv place of the separate belts 32.

The roller or cross-bar 50, over which the sheets are carried by the action of the belts, is not limited to any particular folding device, but may beused where the fence at]. is raised to let one group of sheets pass on to the folding mechanism and depressed to detain the next group of sheets.

In Fig. 2 l have represented trains of gearing that may be made use of for giving motion to the respective parts, and in this figure I have put upon the shafts for the respective gear-wheels the same letters of reference as are employed upon the respective rollers or cams, so as to identify the gear-wheels with the devices that are driven by them. 1, however, do not limit myself to driving the parts by any such train of gearing, as the parts may be actuated in any suitable manner. It will be understood that, in place of the respective ranges of tapes or

belts

25 and 27 and 2 and 32 at the folding-rollers F and G, stationary bars might be made use of, between which the sheets are caused to move, such bars being the known equivalents of the tapes or belts.

It will be. apparent that the folding-rolls may occupy the position sh own by dotted lines in Fig. 1, so as to stand at right angles to the positions represented in full lines.

I claim as my invention 1. The combination, with the folding-rolls and fence and the tapes or belts for convey-- ing the sheets to such folding-rolls, of the cross-bar or roller, the stationary guides or rods over which the sheets are passed, the fingers acting adjacent to the cross-bar, and the cams for giving the proper movements to such fingers, substantially as set forth.

2. The combination, with the folding-rolls and the fence for stopping the sheets, and the tapes for conveying such sheets to the foldingrolls, of the cross-bar or roll and the inclined rods or guides, over which one set of the tapes pass for moving along and delivering the sheets over the cross-bar orroller, substan- 'WALTER SCOTT.

Vitn esses:

WILLIAM G. .Mor'r, HAROLD SERRELL.