Patent US4884309A successfully refreshed from Google Patents.
US4884309A
Expired / Lapsed
US
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Method and apparatus for making shoe lasts and/or shoe components
Assignee: JV FOOTWEAR TECHNOLOGIES Inc
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Filing: 1988-10-12
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Granted: 1989-12-05
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Expires: 2008-10-12
Abstract
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.
Inventors
- 👤 Aharon Shafir
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:24
CPC Classifications
A; A43; A43D; A43D119/00; A43D1/00; A43D1/04; G; G05; G05B; G05B19/00; G05B19/02; G05B19/42; G05B19/4202; G05B19/4207; G05B2219/00; G05B2219/30; G05B2219/35; G05B2219/35038; G05B2219/45; G05B2219/45243
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
137 words
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.
Claim 2
Dependent Claim
137 words
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.
Claim 3
Dependent Claim
26 words
The apparatus according to claim 1, wherein said tracer probe is a wheel rollable along the outer surface of the last while spring-urged into contact therewith.
Claim 4
Dependent Claim
32 words
The apparatus according to claim 2, wherein said last includes an electrically-conductive feather line, and said tracer wheel is of electrically conductive material so as to sense said electrically conductive feather line.
Claim 5
Dependent Claim
18 words
The apparatus according to claim 1, further including an optical sensor for sensing optically-sensible style-lines on said last.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-12-04 | 1993-06-05 | 1993-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-12-04 | 1997-06-05 | 1997-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-12-04 | 2001-06-05 | 2001-12-05 | $7700.00 | Window Closed / Lapsed |