Patent GB-190721779-A (GB)
Title: Improvements in or relating to Machines for Molding Buffing Pad Covers.
Inventor: JUSTICE PHILIP MIDDLETON
Filed: 1907-10-02
Granted: 1908-10-01
Abstract: 21,779. Justice, P. M., [Manufacturers' Machine Co.]. Oct. 2. Stamping ; corrugating.-A machine for moulding into their final form the covers of buffing- pads, u s e d principally in boot and shoe manufacture, comprises means such as pivoted jaws 18, Fig. 3, for gripping the preferably elliptical blanks, and a device such as a heated plunger 4 having a convex upper surface for moulding the blank into shape. Each blank is brought into position above the plunger preferably by carriers 21 having guiding-pins 22 and revolved intermittently by bevel-gearing 24, Fig. 1, and a aprocket-chain 26', and is raised into position between the jaws preferably by a rod 28, Fig. 3, slidably mounted within the moulding-plunger and raised in opposition to a spring 39 by a bell-crank lever 34, Fig. 1, operated by a cam ; a presser 41, Fig. 3, forced downwards by a spring, preferably bears against the upper surface of the blank as it is raised. The jaws 18 are brought into gripping position preferably by raising the carrier in opposition to a spring 26 against the lower faces of the jaws 18 by a sliding sleeve 46 having a dowel pin 47 engaging a hole 48 in the lower face of the carrier, the sleeve being preferably connected by a weighted forked-lever 49, Fig. 1, actuated from a cam on the shaft 60 by a forked link 54, which embraces the shaft 60 and is guided thereby. The plunger is reciprocated by a forked link 66 connected to a rotatable collar 61, Fig. 3, on the plunger, and to a lever 68, Fig. 1, operated by a cam on the shaft 60, and is partly rotated in the moulding position by a sleeve 86 connected by a link 92 to a crank 94 on the shaft 95, so as to prevent overheating and to iron the cover, a projection 89, Fig. 7, on the sleeve 86 working within a U- shaped bracket 87. A pulley 99, Fig. 1, driven by belt-gearing from a shaft 104 and provided with a lateral projection 101, Fig. 10. is loosely mounted on the shaft 95, and a sleeve 106, slidably mounted on the shaft and provided with a corresponding projection 107, is brought at fixed times into engagement with the pulley 99 against a spring 109 by a sliding wedge-block 105, which is connected by a link 111 to a lever 113, Fig. 1, on the same shaft 69 as the lever 68, a pin-and-slot connexion between the link 111 and the lever 113 allowing a certain movement of the lever before the link is operated. A spring 114, Fig. 10, tends to hold the wedge in the raised position. An inward movement is given to the jaws 18, Fig. 3, during the moulding action preferably by pivoting the jaws to radially-sliding jaws 16 having projections engaging inclined grooves 73 in a ring 74, which is partly rotated by connecting it through a link 77, Fig. 1, bell-crank lever 79, and a link 81, to a lever 82 operated by a cam on the shaft 60, the inclinations of the various grooves depending upon the amount of movement it is desired to give to the various jaws 18, Fig. 3. After the cover is moulded, the plunger descends before the rod 28 so that the latter strips the cover from the plunger. The moulded cover may be removed from the carrier by an air blast, the valve of which is opened by a pin 126, Fig. 1, on the carrier sleeve, the air being compressed into a reservoir by an air-pump linked on the main shaft. The heating-medium, such as steam, is supplied to and from the plunger through flexible connexions 13, pipes 7, and a central passage 6, Fig. 3. The plunger is formed with a shoulder 7 so that the moulded cover shall have a recessed part c, Fig. 13, and a lower flared part e, and the cover rim may be corrugated or ridged by leaving a space between the ribs.