US 4,884,309 AGranted

Method and apparatus for making shoe lasts and/or shoe components

OwnerAharon Shafirinventor

Life of this patent

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Abstract

A method and apparatus for making shoe lasts, involves digitizing on the fly a large number of sample points on the outer surface of a model last representing a particular shoe style to produce a model last digital file representing the three-dimensional surface contour of the respective model last; grading the model last digital file to produce one or more graded last digital files each representing a different last size of the respective soe style; and utilizing each of the graded last digital files to produce a graded shoe last of the respective shoe style. The invention may also be utilized for making graded components of shoes, and for modifying shoe styles or creating new shoe styles by CAD/CAM techniques.

Claims4

Dependent claims

Digitizing apparatus, comprising:

a rotary motor for rotating a last about its longitudinal axis, constituting a first axis;
a first encoder producing an electrical output representing the instantaneous angular position of the model last about said first axis;
a tracer probe;
a spring urging said tracer probe along a second axis. Perpendicular to said first axis, in contact with the outer surface of the model last as the model last is rotated by said motor about said first axis;
a second encoder producing an electrical output representing the instantaneous linear position of said tracer probe along said first axis;
linear drive means for driving said tracer probe along a third axis parallel to said first axis;
and a third encoder producing an electrical output representing the instantaneous linear position of the tracer probe along said third axis.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 07/256,721Filed 12 Oct 1988 · division
Priority: 15 Oct 1987
Granted: 5 Dec 1989
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

A43D 119/00
Driving or controlling mechanisms of shoe machines
A43D 1/04
Foot or last measuring devices; Measuring devices for shoe parts: last-measuring devices
G05B 19/4207
Preparation of the program medium using a drawing, a model: in which a model is traced or scanned and corresponding data recorded
G05B 2219/35038
Nc in input of data, input till input file format: combine, superpose model, foot data with style data

Family

Serial109,297Parent of this division · filed 15 Oct 1987
US 4,817,222 AParent of this division
US 4,884,309 AThis patent

From the US filing history. Foreign family members aren’t listed.

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