Patent GB-190815252-A (GB)
Title: Improvements in or relating to Machines for Slitting or for Slitting and MArking Insoles of Boots and Shoes.
Inventor: CAVANAGH JAMES
Filed: 1908-07-18
Granted: 1909-08-18
Abstract: 15,252. Cavanagh, J. July 19, 1907, [date applied for under Section 91 of Patents &c. Act, 1907]. Cutting-machines for leather. - A machine for slitting or for slitting and marking insoles for boots &c., comprises means for cutting slits part way through the insole before channelling &c., at the points where the stitch-receiving rib begins and ends, or for cutting the lips of ready-formed channels adjacent to the heel portion of the sole. Means may be provided to regulate automatically the depth of cut in insoles of varying thickness ; adjustable or other gauges may determine the position of the insole relative to the cutters and these gauges may act in conjunction with an external size indicator. The sole is supported in a plane inclined to the cutting-means. The machine is adapted to mark the unribbed surface of the insole at a point having a given relation to the end of the stitch-receiving rib, to facilitate the subsequent application of reinforcing material. Means are also provided to mark similarly the ribbed surface ot the insole, to serve as a guide in inseam sewing and in cutting off and butting the ends of the welt. The size or other identification mark may also be impressed upon the insole. The slitting knives 1 are mounted on a reciprocating slide 4. A bolt 3 passes through a longitudinal slot in the knife, and is screwed into a lower clamping block and into an L-shaped block 5. The bolt passes through a transverse slot in the slide 4. The two L-shaped blocks 5 are connected by an adjusting screw 6 having right and left handed .threads. A knurled disk on the screw 6 engaging lugs projecting from the slide 4 serves to adjust the knives simultaneously in a transverse direction. The knives may be adjusted longitudinally by slackening the bolts 3. The insole is held upon an inclined support 23, and is slit by the movement of the slide 4. The slide is operated from a shaft 10 by an adjustable yielding connecting-rod 11 and a crank-pin 8. The slide 4 reciprocates in vertically adjustable guides 14. The insole is clamped in position on the work-support 23, during cutting, by a presser-foot 17, which is pivoted to the forward end of a slide 18. This slide is reciprocated in guides in the machine frame by a spring connexion 19 with the slide 4. To regulate the depth of cut, after the presser-foot 17 has engaged the work, an adjustable stop-screw 20 in the slide 4 engages a stop-pin 21 in the slide 18. The yielding connecting-rod 11 takes up any excess movement of the crank - pin. A lever projects downwardly from the rear of the presser-foot and engages an adjustable stop on the machine frame, to force the presser-foot towards the work-support in opposition to the restoring action of a coiled spring 46. To mark the unlipped surface of the insole, teeth 44 are provided on the machine frame which is slightly above the plane of the front edge of the work-support. The marks upon the ribbed surface of the insole are formed by teeth 45 upon the forward end of the presser-foot. Both series of marks are produced by the clamping action of the presser-foot. By the same action, the work is forced down upon number-wheels 39, 40 for marking the sizes and fractional sizes respectively. The dies upon these wheels project upwards through a slot in the work-support, and the presser-foot is provided with a co-operating hardened wearing- surface. The number - wheels 37, 40 and their respective operating hand-wheels are fixed upon concentric shafts journaled in brackets on the machine frame, registering means 37<a>, 43<a> being furnished. Adjustable gauge-pins 28, 29, 30 engage the heel end of the insole placed upon the worksupport. These gauge-pins project upwardly from a slide 31 arranged under the work-support, which is slotted to accommodate the two side-pins 29, 30. A rack on the underside of the slide engages a gear 34 meshing with a pinion 35 fixed on an extension of the shaft 36 which carries the whole size dies. Thus, the position of the insole gauge is controlled by the adjustment of the size marker. Figures on the band-wheel 38 connected to the whole size numberwheel co-operate with a fixed pointer to indicate the adjustment of the apparatus. The work-support 23 consists of an angle-shaped casting which is clamped with the work-supporting surface inclined to the path of the cutters between brackets depending from the front portion of the machine frame.