Automatic Apparatus for Feeding Sheets of Paper to Quick Printing Presses, Calendering Machines, Folding Machines and the like.

摘要

7277. Golby, F. W., [K÷nig, A.]. April 19. Feeding sheets.- Relates to apparatus for feeding sheets to printing, calendering, folding, &c. machines, of the kin d described in Specification No. 7168, A.D. 1899. Fig. 1 shows an arrangement in which the rotating feed-discs 17, carrying the feed-rubbers c', Fig. 11, are mounted loosely on a shaft b carried by levers 73 on a shaft 51. In the other arms of the levers 73 is a shaft 75 provided with feed-discs 4. When the top sheet is fed forward to contact-springs d, an electric circuit is closed which actuates mechanism to stop the rotation of the feed-discs 17. When the top sheet is to be fed off, a cam 53 actuates an arm 70 of a shaft 50, and lowers presser-feet 2 on to the rest of the sheets, and a rod 66 actuates an arm 67 on the shaft 51 so that the discs 17 are lifted and the discs 4 are lowered on to the pile to feed off the top sheet. The shaft 3 carrying the contact-fingers d is rocked to permit of the free passage of the sheet, by an arm 60 and rod 68 connected to the arm 67. The shafts band 75 are continuously driven from the shaft 76 by belt &c. gearing 58, 62, 63, 64, etc.; and a belt 55 drives the shaft 76 from the shaft 52 of the cam 53. The rubbers c4 are pivoted, as shown in Fig. 11, at 72 on the discs 17, and inner slotted arms of the rubbers are engaged by pins 7 on a disc 8 pulled by a spring 9 connected at its opposite ends to the discs 17, 8. Fig. 7 shows the means for driving and stopping the feed-discs 17. Projections 35 on the discs 17 are normally engaged by a pin 36 sliding through a bracket 37 fixed on the shaft b and through an armature 38 pivoted on a bracket 39 also fixed on the shaft b. The magnet c' is carried by the bracket 37, and its circuit includes the contact-rings and springs 45, 46, 47, 48, and the contact-fingers d, Fig. 1. When the circuit is closed by the front edge of the sheet engaging the fingers d, the magnet c1 attracts its armature 38, which withdraws the pin 36 from the projections 35 on the disc 17. A spring 77 tends to press the pin 36 into engagement with the projections 35. In a modification of this stopping-mechaniam, the pin 36 carries an insulated piece which is normally in engagement with two fixed contact-fingers in the circuit, but, when the pin 36 is moved away from the disc 17, the piece moves off the contactfingers, and breaks the circuit. The pin 36 is restored to position to engage the projections 35 by a fixed incline which engages its rear end when the shaft b and discs 17 are lifted from the pile of sheets. Fig. 4 shows an arrangement for stopping the disc by pneumatic means. The top sheet operates fingers 20, pivoted at 19 and connected by a rod 23 to the piston 21 of a cylinder 22 connected by a pipe 24 to an air pump. The movement of the piston due to the fingers 20 puts a diagonal bore 25 of the piston into communication with the pipe 24, and the piston is then drawn in by suction and rocks the fingers 20 to allow the sheet to pass. A pipe 26 passes from the cylinder 22 to a cylinder 27, the piston of which operates, through lever mechanism, clutches on the shaft which drive the discs 17. In another arrangement, the clutches are operated by mechanical means, in which the fingers 20, when moved by the sheet, release an arm of a lever connected to levers which operate the clutches, and a cam restores the parts to position when the sheet is fed off.