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US4505660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for making a one-piece, washable and sterilizable plastic shoe
Assignee: Medimex GmbH and Co KG
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Filing: 1982-03-03
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Granted: 1985-03-19
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Expires: 2002-03-03
Abstract
Abstract A one-piece, washable and sterilizable plastic shoe comprising a lower part with a top on which the foot bears and a bottom enveloping an outsole and a heel, and an upper part having ventilating openings in a substantially vertical lateral area, these openings having upper and lower outer boundary edges that are lower, respectively, than the corresponding upper and lower inner boundary edges thereof. The method for producing such a plastic shoe includes the steps of introducing mouldable plastic into a mould comprising top and bottom halves with a shoe last therebetween and simultaneously forming the lateral ventilating openings by means of spaced pins extending between the bottom-half mould and the last. The apparatus for producing the shoe comprises a mould having top and bottom halves with a shoe last therebetween and a plurality of pins extending from the bottom-half mould into removeable engagement with the shoe last. The pins are shaped and oriented to provide the desired configuration to the ventilating openings.
Inventors
- 👤 Hartmut Seidel
- 👤 Winrich B. Hammerschmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:44
CPC Classifications
B; B29; B29D; B29D35/00; B29D35/0009; B29D35/0018; A; A43; A43B; A43B1/00; A43B1/14; A43B3/00; A43B3/10; A43B3/101; A43B3/102; A43B7/00; A43B7/06; A43B7/08; A43B7/084; A43B7/088
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
119 words
An apparatus for producing a one-piece, washable and sterilizable plastic shoe comprising: a mould with a bottom-half mould, and a moveable top-half mould, and a correspondingly adapted shoe last located therebetween to form an entire shoe, said bottom-half mould having pins extending therefrom which are upwardly and inwardly directed from said bottom-half mould towards and into engagement with said last, and spaced along said bottom-half mould so that they form lateral ventilating openings (6) on the shoe, whose outer boundary edges (12, 13) are lower than the corresponding inner boundary edges (14, 15) and which in the substantially vertical lateral area (5) of the upper part of the shoe are spaced from one another over the outsole edge (10).
Claim 2
Independent Claim
119 words
An apparatus for producing a one-piece, washable and sterilizable plastic shoe comprising: a mould with a bottom-half mould, and a moveable top-half mould, and a correspondingly adapted shoe last located therebetween to form an entire shoe, said bottom-half mould having pins extending therefrom which are upwardly and inwardly directed from said bottom-half mould towards and into engagement with said last, and spaced along said bottom-half mould so that they form lateral ventilating openings (6) on the shoe, whose outer boundary edges (12, 13) are lower than the corresponding inner boundary edges (14, 15) and which in the substantially vertical lateral area (5) of the upper part of the shoe are spaced from one another over the outsole edge (10).
Claim 3
Dependent Claim
22 words
An apparatus according to claim 1, characterized in that the last is provided with corresponding recesses in which the pins can engage.
Claim 4
Dependent Claim
74 words
An apparatus according to claim 1, characterized in that the pins in the bottom-half mould are arranged and shaped in such a way that they form lateral ventilating openings (6) of the shoe, whose connecting sides between the outer boundary edges (12, 13) and the corresponding inner boundary edges (14, 15) form an angle between 0° and 30° with the normal line of the shoe perpendicular to the horizontal opening plane of the mould.
Claim 5
Dependent Claim
16 words
An apparatus according to claim 1, characterized in that said angle is between 5° and 15°.
Claim 6
Dependent Claim
50 words
An apparatus according to claim 1, characterized in that the pins connected to the bottom-half mould are shaped in such a way that they form ventilating openings (6) on the shoe, whose upper and lower outer boundary edges (12, 13) are in one plane at right angles to the horizontal.
Claim 7
Dependent Claim
48 words
An apparatus according to claim 1, characterized in that the pins connected to the bottom-half mould are shaped in such a way that they form ventilating openings on shoe (6), the upper outer boundary edge (12) being further to the outside than the lower outer boundary edge (13).
Claim 8
Dependent Claim
43 words
An apparatus according to claim 1, characterized in that the pins are shaped in such a way that they form ventilating openings (6) on the shoe, whose lower inner boundary edges (15) are positioned further inwards than the corresponding inner boundary edges (14).
Claim 9
Dependent Claim
73 words
An apparatus according to claim 1, characterized in that the pins connected to the bottom-half mould are arranged in such a way that in the specified, substantially vertical lateral area (5) of the shoe they form at least one row of all-round, ventilating openings (6) beginning in the vicinity of the heel on one side of the shoe and ending in the vicinity of the heel on the other side of the shoe.
Claim 10
Dependent Claim
15 words
An apparatus according to claim 1, characterized in that the pins have a rectangular cross-section.
Claim 11
Dependent Claim
15 words
An apparatus according to claim 1, characterized in that the pins have a circular cross-section.
Claim 12
Dependent Claim
15 words
An apparatus according to claim 1, characterized in that the pins have an oval cross-section.
Claim 13
Dependent Claim
17 words
An apparatus according to claim 1, characterized in that the pins taper conically towards the pin end.
Claim 14
Independent Claim
126 words
An apparatus for producing a one-piece, washable and sterilizable plastic shoe comprising: a mould having a bottom-half mould, and a moveable top-half mould, and a shoe last located therebetween to form an entire shoe, said bottom-half mould having spaced pins extending therefrom into engagement with said last to form lateral ventilating openings in the shoe, said pins being upwardly and inwardly directed from said bottom-half mould towards said last, each of said pins having the top of the base thereof extending from said bottom-half mould lower than the top of the distal end thereof in engagement with said last and having the bottom of the base thereof extending from said bottom-half mould lower than the bottom of the distal end thereof in engagement with said last.
Claim 15
Independent Claim
126 words
An apparatus for producing a one-piece, washable and sterilizable plastic shoe comprising: a mould having a bottom-half mould, and a moveable top-half mould, and a shoe last located therebetween to form an entire shoe, said bottom-half mould having spaced pins extending therefrom into engagement with said last to form lateral ventilating openings in the shoe, said pins being upwardly and inwardly directed from said bottom-half mould towards said last, each of said pins having the top of the base thereof extending from said bottom-half mould lower than the top of the distal end thereof in engagement with said last and having the bottom of the base thereof extending from said bottom-half mould lower than the bottom of the distal end thereof in engagement with said last.
Claim 16
Dependent Claim
42 words
An apparatus according to claim 13, characterized in that the top and bottom side walls of each of said pins between the base and distal end thereof forms an angle which is less than 90° with the normal line of said shoe.
Claim 17
Dependent Claim
16 words
An apparatus according to claim 14, characterized in that said angle is between 0° and 30°.
Claim 18
Dependent Claim
16 words
An apparatus according to claim 14, characterized in that said angle is between 5° and 15°.
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) | 1988-03-18 | 1988-09-17 | 1989-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-18 | 1992-09-17 | 1993-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-18 | 1996-09-17 | 1997-03-19 | $7700.00 | Window Closed / Lapsed |