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US 5,303,442 AGranted
Machine for lasting side portions of shoe uppers
AssigneeBritish United Shoe Machinery Ltd.
InventorsJames R. Flanders, Richard E. Storer, Frank Hartshorn
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AssigneeBritish United Shoe Machinery Ltd.
InventorsJames R. Flanders, Richard E. Storer, Frank Hartshorn
Estimating the term…
A side (or heel seat and side) lasting machine comprises two lasting rollers (232; 232') arranged one at either side of a shoe support (20) by which a shoe is supported bottom up. Each roller (232; 232') has a helical rib arrangement (294) which, when rotated while in pressing engagement with the shoe bottom, effects an inwiping movement on the lasting marginal portions of the shoe upper. The rollers (232; 232') are inclined to the longitudinal center line of the shoe support, with their free ends directed heelwardly; the acute angle subtended between each center line and the roller axis of rotation is in the order of 50.degree. to 62.degree., preferably 57.degree.. The lasting rollers (232; 232') are of non-metallic material, preferably synthetic polymer or ceramic material, and have a single helical rib the pitch of which is in the range of 10 to 15 mm.
A machine for lasting side portions of shoe uppers comprising
A lasting roller comprising a cylindrical body which has a helical rib arrangement on the outer surface thereof whereby as the roller rotates while in contact with a lasting marginal portion of a shoe upper the helical rib arrangement can effect an inwiping movement on such lasting marginal portion, the helical rib arrangement comprising a single rib having a fixed pitch dimension, wherein the fixed pitch dimension lies in the range 10 to 15 mm and the outside diameter of the roller lies in the range 15 to 25 mms.
A lasting roller according to claim 19 the outside diameter of which is in the order of 18 mm.
Dependencies are inferred from the claim text.