Patent GB-190326724-A (GB)
Title: Improvements in Paper Sheet Feeding Machines.
Inventor: DEXTER TALBOT CHAMBERS
Filed: 1903-12-07
Granted: 1904-02-04
Abstract: 26,724. Dexter, T. C. Dec. 7. Feeding sheets.-Relates to sheet-buckling mechanism for paper-feeding machines of the kind in which the sheets of an adjustably-supported pile are first buckled at thecorners, and afterwards fed by pneumatic or other devices to the printing, folding, or other machine. A buckler-frame 16, Fig. 3, is adjustable by means of a screw 17 within guideflanges 15 on a bracket, adjustable on a transverse bar 2. A buckling-finger 40 is mounted on a pin 55 in the lower curved end 30<a> of a lever 30, which is pivoted to the frame 16, and has a heel or lug 32 pivoted to a spring-surrounded rod 33 passing through a guide-bracket 34, and is provided with a roller 66 engaging against a cam 65 on a shaft 25 connected to an operating-shaft by a universal joint. The free end of the finger 40 is formed with a yoke 41 for a soft rubber roll 42, on one journal of which is a ratchet-wheel 44 for engagement by a rigid pawl 47 on a yoke 45 slotted to fit over the journal ends. The yoke 45 is linked to a tension and lifting lever 70 provided with a roller 73 engaging against a cam 74 on the shaft 25. A rod 78 is pivoted to the lever 70 and passes freely through a nut 80 adjustable in the bracket 34 and secured by a nut 83, and a spring 81 is confined on the rod 78 between its lower end and the nut 80. A holding-down foot or clamp 95 is mounted on an arm or lever 96 pivoted on a pin 97 secured to the frame 16, and is controlled by a cam 102 on the shaft 25, through a lever 98 provided with a tension spring, a roller 101 for engagement against the cam 102, and a roller 100 for engagement upon the lever 96. A buckler stop 110, in the form of a rubber block, is mounted in an arm 112 secured to a lever, which is adjustably connected to a rock-arm 116 integral with a sleeve provided with an adjustable tension spring and a roller arm engaging a fourth cam on the shaft 25. In operation, the roll 42 is rotated by the yoke 45 during the inward stroke of the finger 40, and during the outward stroke the finger 40 is raised by the lever 70 and the pawl 47 is disengaged. A modification is shown in Fig. 6. The buckling-finger is made in two sections 40<a>, 40<b> pivoted together, The section 40b if in the form of a yoke for a rubber block or roll 42, and one arm is extended to form a fork 40<d> receiving a stop-pin 40<e> on the section 40<a>. A leafspring 61 may be secured to the section 40<a>, and projects under the upper prong of the fork 40<d>, and is adjusted by a screw 63. The section 40<a> is connected to the tension and lifting lever 70 by a pivoted lever 75. In operation, the main inward stroke of the bucking-finger is preceded by a slight forward movement and rotation of the roll 42, followed by a partial counteraction. In another modification, shown in Fig. 10, the buckling-finger 180 is pivoted to an arm 178 on a gearwheel 176, which is mounted on the frame 16 and meshes with a gear-wheel 175 on the shaft 25. When a heavier initial pressure is required, a second tension device, similar to the device 78, 81, 70, but with a stronger spring and without a connecting-link, is provided, and its roller lever is formed with a heel resting over a shoulder formed adjacent to the journal of the lever 70, and its controlling-cam is arranged for connection to, and disconnection from, the lighter-pressure device through the heel and shoulder.