US3742544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making footwear
Assignee: Ro Search Inc
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Filing: 1972-08-14
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Granted: 1973-07-03
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Expires: 1992-08-14
Abstract
Abstract The invention refers to the manufacture of shoes with uppers lasted by pulling a string secured to the lasting margin of the upper. Improvements are presented which reduce costs of manufacture especially if the sole is molded directly to the upper. The method of manufacture includes use of a last deformed to obtain preselected location of the lasting margin and to prevent the formation of undesirable spew.
Inventors
- 👤 H Auberry
- 👤 A Liebscher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:21
CPC Classifications
B; B29; B29D; B29D35/00; B29D35/0054; B29D35/0063; A; A43; A43B; A43B15/00; A43B9/00; A43B9/04; B29D35/06; B29D35/061; B29D35/065
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
65 words
Method of manufacture of shoes with uppers of material such as leather, comprising placing and lasting an upper onto a last having a deformation therein, placing said last and upper in contact with the lip of a sole mold cavity, and deforming said upper at least temporarily to force said upper material below said lip into said cavity to widen its periphery below said lip.
Claim 2
Dependent Claim
65 words
Method of manufacture of shoes with uppers of material such as leather, comprising placing and lasting an upper onto a last having a deformation therein, placing said last and upper in contact with the lip of a sole mold cavity, and deforming said upper at least temporarily to force said upper material below said lip into said cavity to widen its periphery below said lip.
Claim 3
Dependent Claim
29 words
The method according to claim 1 further characterized in that said last deformation includes an open recess bridged by the material of said upper and tensioned by said lip.
Claim 4
Dependent Claim
39 words
The method according to claim 2 further characterized in that said recess is located between the edges of a last sole plate and its last body and said last sole plate is insulated from the preferably heated last body.
References Cited (Backward Citations)
US3332097A
Cited
US3345664A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |