Patent GB-190727610-A (GB)
Title: Paper Feeding Device for Printing Machines and the like.
Inventor: SCHNEIDER OTTO
Filed: 1907-12-14
Granted: 1908-09-10
Abstract: 27,610. Schneider, O. Dec. 14. Feeding sheets. - The pile of sheets is carried on a table 39 supported by screws 50 in a carriage 28, capable of lateral movement on runners 29 mounted on rails on a carriage 30, adjustable longitudinally of the main frame 37 by means of rack 48 and pinions, 47. The top of the pile is kept at a constant level by any suitable mechanism, and the frame 28 is moved laterally on its runners 29 by a bellcrank 31. The front edge of the top sheet is rolled up by means of one or more sector-shaped suckers 1, which are supported in slots 3<1> of levers 3 oscillated by a cam 8 on the shaft 9, and are caused to roll backward on the pile by a cam 7, lever 5<1>, and link 5. Any surplus sheets adhering to the top sheet are removed by rubber-faced strikers or fingers 2, Fig. 11. The front edge of the sheet having been lifted clear of the pile, air is admitted to the suckers 1, allowing the sheet to descend on to a suction roller 10 reciprocating in guides 11 formed in the frame 28, which convey it to the roller 12, while a blast of air is sent beneath the sheet to assist in separating it from the pile. The rollers 12, 16 which convey the separated sheet to the cylinder 45, are provided with pinions 24 in gear with wheels 23, which are connected by clutches to pinions 22 in gear with a rack 17, reciprocated by means of the crank 18, link 41, lever 40, and link 42. At the commencement of the upward movement of the rack-bar 17, as the crank 18 passes its dead-centre, a cam-bar 19, reciprocated by a lever 21 and cam 20, actuates the clutches and couples the pinions 22 to the wheels 23. As the rollers 12, 16 attain their maximum speed, runners 25 on arms on the shafts 14, 14' drop into recesses in the back of the rack-bar 17, and permit the wheels 13, 15 to descend into contact with the rollers 12, 16, respectively. The rollers 12, 16 slowly come to rest as the crank 18 approaches its other dead-centre, and deliver the sheet to the cylinder 45, the wheels 13, 15 being at the same time lifted clear of their respective rollers by a cam-surface on the back of the bar 19. During the return of the rack-bar 17, the rollers 12,16 remain stationary. The roller 16 and wheels 15 are insulated, and form part of an electric circuit, which when completed owing to the absence of a sheet, stops the machine. The frame 28<1> carrying the feeding-rollers 12, 16, &c. is pivoted at 26, and may be turned up to obtain access to the impression cylinder. The striker 2 provided with an india-rubber facing 52, is mounted on a pivot 53 journaled in bearings 55 formed on the slotted lever 3. On the pivot 53 is loosely mounted a sleeve 56 provided with a projection, between which and a pin on the striker 2 a spring 59 in tension is secured. A spring 60 secured between a stud on the fast collar 58 and the striker 2, tends to turn the striker 2 away from the sucker 1. A pawl 62, pivoted on an extension 61 of the link 5, engages a stud 64 on the projection on the sleeve 56 after the sucker has commenced to roll up, and by means of the spring 59 draws the striker 2 against the underside of the lifted sheet.