Patent GB-191215405-A (GB)
Title: Improvements in or relating to Machines for Folding the Edge of Leader or similar Material.
Inventor: GLASS PERLEY RICHARDMOND
IPC: A43D8/40
Filed: 1912-07-02
Granted: 1913-09-02
Abstract: 15,405. Glass, P. R. Julv 2. Sheet material, finishing edges of.-A machine for folding the edge of leather and similar material folds the edge progressively by the reciprocation of a folding-finger across the edge of a creaser. The work adjacent to the folding- mechanism rests on a yielding work-support 19, Fig. 4, which projects through an opening in a work - table secured to the upper part of a casing 3 enclosing the machine. The worksupport, which has its outer edges inclined for convenience in bringing the work to operative position, is formed on one end of a lever 25 pivoted to a shaft 26. A frame 30 is clamped to the shaft, the forward part of the frame projecting below and carrying a fixed vertically adjustable stop for the forward part of the level 25. The rear part of the frame projects below and carries a yielding stop for the rear part of the lever 25. A crank arm 36 is clamped to the shaft 26 and is connected bv a link 37 with an arm pivoted on a shaft 39, Fig. 10, and rocked by engagement with an eccentric 40 on a main shaft 12. The work-support is thus given a vertically reciprocating motion. The support may be lowered by hand, against the pressure of its yielding stop, by raising the forward end of the lever 25. The work is guided into position by a fixed gauge 106, Fig. 12, and a cooperating yielding presser-gauge. The gauge 106 is longitudinally adjustable, and is curved upwards from the table level to a shoulder 113, with which a stop on the presser-gauge engages. The work is thus given a slight curve as it is moved up to the gauge. The creaser 20. which rests on the top of the work, has a vertical shank which slides in a head 44 pivoted at 45, Fig. 3, to an overhanging arm secured to the workplate. A screw stop 47, against which the head is normally held by a spring-pressed pin, limits the downward swing of the head about its pivot. The creaser 20 is normally held with an adjustable stop 54 on a lug at the end of its shank against the head 44 by a spring-pressed pin in a casing 51. The creaser can be lifted to insert work by depressing a finger - lever 53, which engages under the lug carrying the adjustable stop 54 and thus causes the creaser to be lifted in its slide and then the head 44 to be turned on its pivot. To turn the edge of work over the creaser, a finger 21, Fig. 6, connected by a universal joint with the end of a lever 62 operated by a cam 63 on the shaft 12, is arranged to reciprocate across the edge of the creaser in a slightly inclined direction. The shank 59 of the finger reciprocates in a guide 60, Fig. 5. formed in a guide-block 56 secured to a projecting part of the machine casing. After the fold has been formed, it is set and the work is fed by a fold presser 23, Fig. 7, and a presser block. The block is rigid and is formed as part of a slide 69, Fig. 4, which reciprocates in guides 70 formed in the top of the casing 3. The foldpresser 23, Fig. 7, is pivoted at 71 in a bearing- plate 72 secured to the underside of the slide 69, and is swung about its pivot to clamp the work by the operation of a cam 78 on the main shaft, which acts upon a lever 77 pivoted on the shaft 39, the lever 77 being connected by a universal joint to a lever 73 fulcrumed on the pin 71 and provided with an adjustable stop to engage the end of the presser 23. The presser is held up to the stop by a spring. The eccentric 78 is so shaped that at first the work is clamped lightly by the presser, but after the feed due to the movement of the slide 69 has begun, increased pressure is applied. The slide 69 is operated to feed the work by the connexions shown in Fig. 10. A plate 89 adjustably secured longitudinally of the slide 69 has downwardly extending projections between which slides a block carried by one arm of a bell-crank lever 84. The lever is rocked by a cam 83 on the shaft 12 operating on a lever 82 pivoted on the shaft 39 The point of connexion of the link 91, which connects the lever 84 with the lever 82, can be varied between limits set by pins 98, by a treadle connected to a link 100, which actuates a bellcrank lever 95, one arm of which encloses the end of the link 91. The feed can thus be varied while the machine is running. The link 100 is detachably connected to the lever 95 by a spring lug 104. When the link 100 is released, the casing 3 can be swung back on a pivot to permit examination &c. of the contained mechanism. The front of the casing is normally held down on the base-plate 1 by a stud and nut. To snip the work while operating on a curve, a knife 114, Fig. 11, carried in a lever 116 swinging in the slot 117, Fig. 5, of the guide 56, is adapted to co-operate with a fixed blade on the back of the gauge 106, Fig. 12. The lever 116, Fig. 11, is pivoted on a pin 118, and its other end terminates in a ball head 120. The ball head 120 enters a slot in a frame 124, which is reciprocated by an eccentric 131 on the shaft 12 and is provided with a vertically sliding pin 127, which in its uppermost position is adapted to engage the ball and to hold it against a spring- pressed pin 126, thus causing the knife to be operated. The pin 127 is raised to engage the ball by a slide 128 operated by a knee-lever and provided with a cam-surface for engaging a pin 129 on the sliding pin 127 when the knee-lever is moved. The main shaft 12 is mounted in bearings in the casing 3 and is provided with a hand-wheel and a friction member fast thereon. Suitable pulleys are adapted to be brought into contact with the friction member to rotate the shaft.