Apparatus for pulling the lasting edges of lasted shoe uppers over insoles
AssigneeMaschinenfabrik Moenus-Turner GmbH
InventorWolfgang Emmerich
Life of this patent
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Abstract
Apparatus for pulling the lasting edge of a lasted shoe upper over an insole has at least one flexible elastic shaft one end portion of which is anchored in a motor-driven rotor and which is loosely surrounded by a helical spring. One end of the spring is anchored in the rotor and its other end is movable axially of the shaft toward and away from the one end. The spring yields in response to the application of an excessive pull to the lasting edge and thus prevents overstressing of the lasting edge and/or the development of wrinkles.
Claims20
In a lasting machine having means for pulling the lasting edges of a shoe upper over an insole while said upper is mounted on a last, the improvement comprising:
- said means for pulling including at least one flexible elastic shaft having first and second end portions;
- means for rotating the first end portion of said shaft;
- and at least one substantially helical thread surrounding and rotatable with said shaft.
In a lasting machine having means for pulling the lasting edges of a shoe upper over an insole while said upper is mounted on a last, the improvement comprising:
- said means for pulling including a shaft having first and second end portions;
- means for rotating the first end portion of said shaft;
- and at least one substantially helical thread having an end portion which receives torque from said rotating means and said thread further having helical convolutions loosely surrounding said shaft.
Dependencies are inferred from the claim text.