Patent GB-802078-A (GB)
Title: Machine for lasting
Inventor: PISARONI GIUSEPPE
IPC: A43D75/00
Filed: 1955-04-12
Abstract: 802,078. Lasting machines; nailing; discontinuous wire stitching. MASCHINENFABRIK MOENUS A.G. April 12, 1955, No. 10513/55. Classes 17(1) and 89(3) In a lasting machine having gripper mechanism for closing the gripper jaws 37, 38 on the edge of the upper and pulling the upper over the insole, wiper mechanism to cause a wiper 19 to wipe the edge of the upper over the insole, wire driving mechanism by which a forwarding clamp is retracted against spring action and suddenly released to drive a fastening; and severing mechanism for cutting off the fastening, a transverse shaft carries cams a (not shown), c, b, d (not shown), which operate respectively the gripper, upper, driving, and severing mechanisms directly or through a simple lever. Treadle 3 controls the clutch and operation of all working parts except the grippers which are controlled by treadle 3<SP>1</SP>. The wire F is clamped on a block 8, pivoted at 9, by a clamp 16 which prevents pulling back, and passes through a clamp 17 on wire driver 11, clamps 16, 17 being operated alternately, and through a bore in guide block 18. Extension 8<SP>1</SP>, attached to block 8 and adjustable horizontally relatively thereto by means of an adjustable eccentric attached to a graduated segment 24, has pivoted thereto a deflecting plate 22 by which the curvature imparted to the wire is adjusted, the plate being spring pressed against block 18 at the lower end of the bore through which the wire travels. Wiper 19 is attached to extension 8<SP>1</SP>, and beneath the wiper a shoe edge guide 20 is secured to the frame. Driver 11 is moved upwardly in a bore in block 8 by cam b acting through roll 50<SP>11</SP> on bell crank 50, pawl 51, and pawl 52 which engages beneath a lug on the driver. When the upward movement .of link 53 depending from pawl 51 is limited, by a pin adjustable by hand lever 25<SP>1</SP> and engaged in a slot 54 in. the link, pawl 51 continues to rise and is pivoted so that it disengages from pawl 52, the latter is disengaged from the driver by spring 52<SP>1</SP>, and the driver is driven downwardly by spring 15 acting through 14, 13. This downward movement is limited by an adjustable abutment 12. Knife 21 is reciprocated by cam d (not shown) acting through a bell crank and toothed segment which engages teeth on the knife slide 28, the knife first cutting the wire and then pressing down the protruding end. The grippers are closed and thrust outwardly by cam a (not shown). Arms 35, 35<SP>1</SP> pivoted to plate lever 34, which is pivoted at 34a and adjusted by screw 34<SP>1</SP> and slot 34<SP>11</SP>, support bracket 36 carrying gripper jaw 37 to which jaw 38 is pivoted at 38<SP>1</SP>. The cam acts through a roll to swing lever 60 so that rod 43 is moved lengthwise first pivoting bell crank 41 which acts through arm 39 to move jaw 38 to a closed position, and then, when pin 43<SP>1</SP> engages the end of slot 63, moves the grippers as a whole to tension the upper, Lever 60 is normally held from cam a by an arm 61, but is moved by a spring to engage the cam when arm 61 is removed by actuation of treadle 3<SP>1</SP>. On operation of treadle 3 cam a closes and moves the grippers to tension the upper which is also wiped by wiper 19 under control of cam c. The driver is then operated by cam b followed by movement of the knife under control of cam d to sever the wire. Jaw 38 is returned by a thrust pin 45 striking a slanting abutment surface 44 on arm 39, and the knife then presses the end of the fastener. The shoe is then shifted by hand along guide 20 and the operation repeated. In the modification shown in Figs. 13 and 15, the wire is deflected by a strip 18<SP>11</SP>and then by the deflecting surface 22<SP>1</SP> of an interchangeable deflecting plate 22 which is detachably hooked to an adjustable arm so that the relative positions of parts 22, 18<SP>11</SP> may be adjusted. A C-shaped fastening (as in Fig. 15) may thus be obtained instead of the S-shaped fastening shown in Fig. 1.