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US3564335A Expired / Lapsed US ⏱️ 0.0 years remaining

Electrically conductive shoe cover

Assignee: American Hospital Supply Corp
•
Filing: 1969-01-30
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Granted: 1971-02-16
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Expires: 1989-01-30
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Abstract

Abstract A plastic overshoe adapted to be worn by physicians and nurses during surgery to electrically ground their bodies to a floor on which they stand, so static electricity cannot build up and cause a spark near explosive gases sometimes used in surgery. The overshoe fits various shoe sizes and has two superimposed plastic panels joined along their rear and bottom edges with a connecting web across midportions of their top edges holding the panels together. An electrically conductive plastic strip is sealed along a bottom edge of one panel, which strip has an extending portion for tucking into the wearer''s shoe or stocking to make electrical contact with his body. A series of these overshoes connected end to end are made by die-cutting and heat-sealing portions of layflat tubular plastic material.

Inventors

  • 👤 Phillip M Siegel

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-05 03:04
CPC Classifications
A; A43; A43B; A43B3/00; A43B3/16; A43B3/163

Claims Analysis

Total Claims: 14
Claim 1
Independent Claim 115 words
An electrically conductive overshoe adapted to fit various shoe sizes, said overshoe comprising: a thermoplastic tube defining a pair of superimposed integral panels each having top, bottom, front, and rear edges, the top and bottom edges of the panels being integrally secured together in a longitudinal direction of the tube; said panels having portions adjacent their top edges cut away to define a connecting web between the two panels and to form separable top edges of the panels forwardly and rearwardly of the web; the panels being permanently secured together at their rear edges; and an electrically conductive strip secured along the bottom edge of the overshoe and extending outwardly beyond the overshoe''s rear edge.
Claim 2
Dependent Claim 115 words
An electrically conductive overshoe adapted to fit various shoe sizes, said overshoe comprising: a thermoplastic tube defining a pair of superimposed integral panels each having top, bottom, front, and rear edges, the top and bottom edges of the panels being integrally secured together in a longitudinal direction of the tube; said panels having portions adjacent their top edges cut away to define a connecting web between the two panels and to form separable top edges of the panels forwardly and rearwardly of the web; the panels being permanently secured together at their rear edges; and an electrically conductive strip secured along the bottom edge of the overshoe and extending outwardly beyond the overshoe''s rear edge.
Claim 3
Dependent Claim 18 words
An electrically conductive overshoe as set forth in claim 1 wherein the panels are of an antistatic thermoplastic.
Claim 4
Dependent Claim 17 words
An electrically conductive overshoe as set forth in claim 2 wherein the antistatic thermopLastic panels are polyethylene.
Claim 5
Dependent Claim 20 words
An electrically conductive overshoe as set forth in claim 1 wherein rear edges of the panels are heat sealed together.
Claim 6
Dependent Claim 29 words
An electrically conductive overshoe as set forth in claim 1 wherein the panels are a homogeneous one-piece thermoplastic film material which is folded to form the panels'' bottom edges.
Claim 7
Dependent Claim 29 words
An electrically conductive overshoe as set forth in claim 1 wherein the electrically conductive strip is of polyethylene and has a resistivity of between 50,000 and 200,000 ohms/linear foot.
Claim 8
Dependent Claim 54 words
An electrically conductive overshoe as set forth in claim 1 wherein the overshoe panels have their front edges connected to rear edges of a similar overshoe''s panels, whereby a series of overshoes can be connected end to end prior to use, said connected front and rear panel edges having lines of severance between them.
Claim 9
Dependent Claim 20 words
An electrically conductive overshoe as set forth in claim 7 wherein the lines of severance include a series of perforations.
Claim 10
Independent Claim 105 words
A method of making conductive overshoes from a roll of tubular thermoplastic material which has two superimposed panels joined by longitudinal top and bottom folds, said method including the steps of: intermittently severing the material along the top fold leaving longitudinally spaced connecting webs across the top fold connecting the two panels; sealing the panels together between the webs in a direction transverse to the top and bottom folds; forming a line of severance adjacent each transverse seal so individual shoes can be separated from the roll; and sealing an electrically conductive thermoplastic strip to at least one of the panels adjacent the bottom fold.
Claim 11
Independent Claim 105 words
A method of making conductive overshoes from a roll of tubular thermoplastic material which has two superimposed panels joined by longitudinal top and bottom folds, said method including the steps of: intermittently severing the material along the top fold leaving longitudinally spaced connecting webs across the top fold connecting the two panels; sealing the panels together between the webs in a direction transverse to the top and bottom folds; forming a line of severance adjacent each transverse seal so individual shoes can be separated from the roll; and sealing an electrically conductive thermoplastic strip to at least one of the panels adjacent the bottom fold.
Claim 12
Dependent Claim 58 words
A method of making conductive overshoes as set forth in claim 9 wherein the method also includes the step of forming a series of transverse perforations at each line of severance in an area near where the panels are transversely sealed together so that the overshoes can be torn from the roll of tubular thermoplastic material as needed.
Claim 13
Dependent Claim 203 words
An electrically conductive overshoe adapted to fit various shoe sizes, said overshoe comprising: a thermoplastic tube defining a pair of superimposed integral panels each having top, bottom, front, and rear edges, the top and bottom edges of the panels being integrally secured together in a longitudinal direction of the tube; said panels having portions adjacent the top edges cut away to define a connecting web between the two panels and to form separable top edges of the panels forwardly and rearwardly of the web; said rear edges of the panels being permanently secured together, whereby a wearer''s foot and shoe can be inserted into a pocket formed by the two panels between the web and rear edges, and whereby at least portions of the panels between the web and front edges can be pulled apart and folded back over the shoe, which overshoe is adapted to be held in such position by a rubber band around the wearer''s instep; and an electrically conductive thermoplastic strip sealed along a bottom edge of at least one panel, said conductive strip extending outwardly beyond the rear edge of the panel for conducting electricity from a body of the wearer to a floor on which he stands.
Claim 14
Dependent Claim 203 words
An electrically conductive overshoe adapted to fit various shoe sizes, said overshoe comprising: a thermoplastic tube defining a pair of superimposed integral panels each having top, bottom, front, and rear edges, the top and bottom edges of the panels being integrally secured together in a longitudinal direction of the tube; said panels having portions adjacent the top edges cut away to define a connecting web between the two panels and to form separable top edges of the panels forwardly and rearwardly of the web; said rear edges of the panels being permanently secured together, whereby a wearer''s foot and shoe can be inserted into a pocket formed by the two panels between the web and rear edges, and whereby at least portions of the panels between the web and front edges can be pulled apart and folded back over the shoe, which overshoe is adapted to be held in such position by a rubber band around the wearer''s instep; and an electrically conductive thermoplastic strip sealed along a bottom edge of at least one panel, said conductive strip extending outwardly beyond the rear edge of the panel for conducting electricity from a body of the wearer to a floor on which he stands.

References Cited (Backward Citations)

US3337770A Cited
US3283422A Cited
US3268767A Cited
US3402323A Cited
US3359658A Cited
US3422550A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1974-02-15 1974-08-17 1975-02-16 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1978-02-15 1978-08-17 1979-02-16 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1982-02-15 1982-08-17 1983-02-16 $7700.00 Window Closed / Lapsed

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