Patent GB-193966-A (GB)
Title: Driving and feed mechanism for machines for skiving and splitting leather
IPC: C14B1/00
Filed: 1921-12-01
Abstract: 193,966. Schoening, H. Dec. 1, 1921. Splitting-machines.- A skiving and splitting machine comprises (1) means for blocking the tilting of the feed roll during splitting and vice versa, (2) a feed roll with uniform peripheral velocity, (3) knife withdrawing and adjusting mechanism, (4) driving mechanism and (5) improved presser head. (1) Feed roll 92 - - 98 is held at one end in a bracket 99 pivoted in a bracket 110. A lever 113 secured to an extension 109 of the bracket 99 is movable to adjust the tilt of the feed roll and is urged against a stop 117 by a spring 115, one end of which is adjustable on a slide 118. The bracket 110 which swings about a rod 112, terminates at the bottom in an extension 126 carrying an adjustable set pin 124 and carries a locking lever 125, which is urged by a spring 119 and carries an extension which can come under the heel of the lever 113. The arrangement is such that the lever 113 controlling the tilting for skiving is locked by the sector 125 until the sector has been moved to put the spring 119 controlling the swinging movement for splitting nuder considerable tension. (2) The feed roll Fig. 6, comprises a series of separate discs 92 - - 98, of the same mean diameter loosely mounted on an eccentrically stepped fixed shaft 91. The roll is driven through a shaft 87 connected to the disc 92 from which the other discs are driven by driving pins 101. (3) The cylindrical knife 100 is mounted on a shaft 4 by a nut 133 having spigots 136 engaging holes in the knife. The shaft 4 is held by a conical bush 10 within an externally threaded sleeve 5 carrying a worm wheel 14, held from lateral movement by a casing 15. The knife is adjusted 'for wear by a rod carrying a worm 16 engaging the worm wheel 14. The casing 15 can be slid from a treadle acting through links 190<a>, 190, 186, an adjustable connecting-link 191 actuating a cam 196 to engage the set pin 124. On depressing a treadle (not shown), the knife is withdrawn and the feed roll depressed to allow of the material 'being inserted. A grinding wheel 173, Fig. 2, is driven by a belt 171 from a pulley 170 and is mounted on a spring urged lever 182 adjusted from a handle 175. The pulley 170 is driven from a shaft 71 to which it is adjustably connected. (4) To obviate unshipping the driving belt when the top of the machine is turned back on hinges 19, 20, said hinges are in alignment with the axis of a driving pulley 23, Fig. 2. A belt 22 drives a loose pulley 21 carrying a friction lining 45 so that when a pin 64, operated by means not shown, actuates the clutch it can drive a pulley 30 on the knife shaft 4 and connected by a belt 69 to a pulley 68 on the feed shaft 71. A modification of the driving mechanism is described. (5) A presser plate 149 hinged on a pin 152 and locked in position by a set-screw 154 is carried on a bar 148 adjusted from a hand wheel 156. The hand wheel 156 is connected to a threaded spindle 158 contacting with a stationary bar 159 and having keyed to it a bush 161 externally threaded of the same pitch as the spindle 158, so that on adjusting the hand wheel a spring 163 between the bar 148 and bush 161 remain under uniform tension.