Patent GB-191411722-A (GB)
Title: Process of and Means for "Knocking-up" Sheets and the like particularly Paper Sheets.
Inventor: PETTY JOHN PAXTON
IPC: B41J7/02
Filed: 1914-05-12
Granted: 1915-05-12
Abstract: 11,722. Petty, J. P., and Aylard, W. C. May 12. Delivery apparatus.-In apparatus for knocking-up or piling evenly sheets of paper, envelopes, bags, or the like, the sheets &c. are maintained in a live or vibratory condition throughout the whole or the greater part of the operation by imparting to the receiving table a series of vertical or substantially vertical impulses produced by blows or by checking its movement suddenly. The table may be inclined slightly towards one corner, fitted with reciprocating fences, and resiliently mounted as by supporting it on or from springs or mounting it on a central universal joint and providing tension springs under the corners. The impulses may be produced by a rotating member engaging lugs on the table, and the table may have an orbital movement bodily, such movement being checked by adjustable and elastic blows. Blasts of air may be directed under the sheets as they pass to the table to assist in producing the vibratory condition and ensure that successive sheets of a ga.pped stream shall pass to the top of the pile. In the arrangements shown, the sheets are conveyed to the table and turned over in their conveyance by two sets of endless tapes 15, 16 as described in Specification 29,145/13. The table 1, Fig. 1, is centrally mounted on a universal joint 10 and drawn down at the corners by springs 11, and is inclined slightly towards the corner provided by the fences 3,4, which may be fixed. Movable fences 5, 6 are reciprocated, so that one moves in when the other moves out, by a cam on a vertical shaft and a spring. Impulses in a vertical direction are imparted to the table by one or a pair of rollers 8, carried by a transverse shaft 7 secured to a driven vertical shaft 18, acting against lugs 9 fixed below the table, and blows on the plane of the table may be produced by causing the table to strike against abutments on the frame. In the arrangement shown in Figs. 3 and 6, the sheetreceiving board is given an orbital movement in addition to the impulses, and comprises an apertured board 59 resting on a table 35 supported on springs 40 and provided with stops or strikers 34 which enter wells 33 in the'corners of a table 31 resting on rods 29, 30 extending between connecting-rods 28, which at one end embrace eccentrics 26 on a driven shaft 25, and at the other are linked to stationary brackets 24 on the main frame 20. The impulses are given by members 42, 43 faced with rubber 44, 45 striking the aperture edges of the board 59 or against wedges 54, 55, which can be adjusted longitudinally to regulate the blows. The members 42, 43 are carried by slides 38, 39 mounted in dovetail grooves at right-angles to one another in the table 31 and connected by a bell-crank 41, and movement is imparted to the slide 38 from another eccentric on the shaft 25 acting through a rod on a link pivoted to a fixed bracket 51 and universally jointed to a link connected to the slide. The slides carry the movable fences 60, 61, and one of these, preferably the back fence 60, is perforated and constitutes one side of a bellows, the other side of which is a fixed board, so that as the fence is drawn back, blasts of air are directed below the sheets passing to the board. Excessive movement of the table 35 is prevented by springs 57 connecting it to the table 31 or to the frame.