US3855657A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shoe moulds
Assignee: Individual
•
Filing: 1973-11-12
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Granted: 1974-12-24
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Expires: 1993-11-12
Abstract
Abstract There are disclosed in the present application moulds for producing shoes having soles moulded directly to the upper or separately moulded soles in which there is included means for positioning component shoe bottom parts in the mould preparatory to moulding. The component parts which include decorative edges or foxing and tread inserts for soles are retained by vacuum in the mould. When the sole is being moulded directly to the lasted upper, an insole is positioned and retained in place by vacuum acting through openings in the bottom of the last.
Inventors
- 👤 G Mazzotta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:44
CPC Classifications
B; B29; B29D; B29D35/00; B29D35/06; B29D35/061; A; A43; A43B; A43B1/00; A43B1/02; A43B1/04; A43B13/00; A43B13/02; A43B13/04; A43D; A43D25/00; A43D25/06; A43D43/00; A43D43/06; B29C; B29C33/00; B29C33/12; B29C33/14; B29C33/18
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
66 words
A shoe sole moulding assembly comprising a mould body having interior side and bottom walls defining at least a portion of a cavity for forming the edge and tread of a sole respectively, a channel formed in the side wall adapted to locate a foxing and vacuum means connected to the channel for retaining the foxing until after sole material has been injected into the cavity.
Claim 2
Dependent Claim
66 words
A shoe sole moulding assembly comprising a mould body having interior side and bottom walls defining at least a portion of a cavity for forming the edge and tread of a sole respectively, a channel formed in the side wall adapted to locate a foxing and vacuum means connected to the channel for retaining the foxing until after sole material has been injected into the cavity.
Claim 3
Dependent Claim
29 words
A moulding assembly according to claim 1 further characterized in that the vacuum means comprises a manifold formed in the mould body and connected to a source of vacuum.
Claim 4
Dependent Claim
23 words
A moulding assembly according to claim 1 further comprising a last adapted to receive a shoe upper and to close the mould cavity.
Claim 5
Dependent Claim
32 words
A moulding assembly according to claim 3 further comprising a plurality of passages on the bottom of the last connected to a vacuum source for retaining an insole to the last bottom.
Claim 6
Dependent Claim
30 words
A moulding assembly according to claim 4 further comprising means for connecting a source of compressed air to the passages for assisting in removing a completed shoe from the last.
Claim 7
Dependent Claim
40 words
A moulding assembly according to claim 1 further comprising a sole mould member in which the bottom wall of the cavity is formed and vacuum means including a manifold chamber for retaining a tread insert on the sole mould member.
Claim 8
Dependent Claim
20 words
A moulding assembly according to claim 6 further comprising means for connecting a source of compressed air to the chamber.
Claim 9
Independent Claim
76 words
A method of producing a shoe comprising the steps of mounting an upper on a last, providing a sole mould assembly having a locating channel in its sole edge moulding surface, connecting the channel to a source of vacuum, inserting a decorative foxing in the channel to be retained by the vacuum and injecting molten sole material into the mould to produce a sole bonded directly to the shoe upper and having a foxing covered edge.
Claim 10
Independent Claim
76 words
A method of producing a shoe comprising the steps of mounting an upper on a last, providing a sole mould assembly having a locating channel in its sole edge moulding surface, connecting the channel to a source of vacuum, inserting a decorative foxing in the channel to be retained by the vacuum and injecting molten sole material into the mould to produce a sole bonded directly to the shoe upper and having a foxing covered edge.
Claim 11
Dependent Claim
27 words
A method according to claim 8 further comprising the step of retaining an insole by vacuum on the bottOm of the last preparatory to mounting the upper.
Claim 12
Dependent Claim
19 words
A method according to claim 8 further comprising the step of retaining a tread insert in the sole mould.
Claim 13
Dependent Claim
19 words
A method according to claim 9 further comprising the step of retaining a tread insert in the sole mould.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |