Patent US4512830A successfully refreshed from Google Patents.
US4512830A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical heating cap
Assignee: Individual
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Filing: 1983-10-20
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Granted: 1985-04-23
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Expires: 2003-10-20
Abstract
Abstract A heat cap is provided for applying heat to hair on a user's head, primarily to a pile or row of hair along the top of the user's head. The heat cap is shaped to conform substantially to the shape of the user's head with the pile of hair thereon so as to apply heat evenly to the hair. The heating coil is disposed in the heat cap only in those areas where heat is desired for the hair and is absent in areas of the heat cap where it is undesirable to apply heat to the head. An adjustable flap on each side of the heat cap enables the size of the cap to be adjusted to fit different users. The adjustable flaps also tend to hold the cap outward away from the ear and lower sides of the head and can be easily opened to enable access to the user's ear while the heat cap is being worn. An electrical thermostat automatically brings the heat cap to an optimal temperature and maintains the temperature during the desired conditioning period. The heat cap is manufactured by cutting a plurality of similarily shaped flat pieces and joining them together along certain corresponding sides.
Inventors
- 👤 John G. Hulett
- 👤 Robert Rothenberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:52
CPC Classifications
A; A45; A45D; A45D20/00; A45D20/20; H; H05; H05B; H05B3/00; H05B3/20; H05B3/34; H05B3/342; H05B2203/00; H05B2203/002; H05B2203/003; H05B2203/014; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1036
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
273 words
A method of manufacturing a heating cap to be worn during a hair treating process, comprising: providing identically shaped first and second flat flexible plastic members, each member having a pair of wing-shaped portions which are mirror-images of each other, and which are joined together by a common bridge portion, each wing-shaped portion including first and second curvilinear edges separated by said bridge portion and opposed circular apertures formed in said members, respectively, providing a piece of insulation material having the general shape of each of said wing-shaped portions, placing one of said pieces of insulation material on each wing-shaped portion of said first member, placing a resistance type electrical heating element on each piece of insulation material on said first member, placing another of said pieces of insulation material on each piece of insulation material on said first member and covering said heating element on each wing-shaped portion, placing said second member over said first member and aligned therewith so that the peripheral edges of said members including edges defining said apertures are coextensive; securing said members together along said edges, folding each of said first and second members along their respective common bridge portions so that the corresponding mirror-image wing-shaped portions of both members overlay and are aligned with each other; and attaching the curvilinear edges formed by one of the wing shaped portions of said first and second members to the curvilinear edges of the mirror image wing shaped portions of said first and second members to form a flat heating cap having flexible sides which separate to form a cavity conforming substantially to the shape of a human head.
Claim 2
Independent Claim
273 words
A method of manufacturing a heating cap to be worn during a hair treating process, comprising: providing identically shaped first and second flat flexible plastic members, each member having a pair of wing-shaped portions which are mirror-images of each other, and which are joined together by a common bridge portion, each wing-shaped portion including first and second curvilinear edges separated by said bridge portion and opposed circular apertures formed in said members, respectively, providing a piece of insulation material having the general shape of each of said wing-shaped portions, placing one of said pieces of insulation material on each wing-shaped portion of said first member, placing a resistance type electrical heating element on each piece of insulation material on said first member, placing another of said pieces of insulation material on each piece of insulation material on said first member and covering said heating element on each wing-shaped portion, placing said second member over said first member and aligned therewith so that the peripheral edges of said members including edges defining said apertures are coextensive; securing said members together along said edges, folding each of said first and second members along their respective common bridge portions so that the corresponding mirror-image wing-shaped portions of both members overlay and are aligned with each other; and attaching the curvilinear edges formed by one of the wing shaped portions of said first and second members to the curvilinear edges of the mirror image wing shaped portions of said first and second members to form a flat heating cap having flexible sides which separate to form a cavity conforming substantially to the shape of a human head.
Claim 3
Dependent Claim
72 words
The method set forth in claim 1 including the steps of: providing said members with opposed edges intersecting said apertures to form a wedge shaped opening between said apertures and further edges of said members; and joining said first and second members to each other along said opposed edges intersecting said apertures and along said further edges to enclose said insulation material and said heating element between said first and second members.
Claim 4
Dependent Claim
81 words
The method set forth in claim 2 including the steps of: providing said pieces of insulation material of a size such that a border is provided substantially all around the periphery of said first member and is exposed to a corresponding border of said second member; heat sealing said borders together; and heat sealing said borders along said curvilinear edges upon folding said first and second members to overlay each other to join said members so as to form said cavity.
Claim 5
Dependent Claim
61 words
The method set forth in claim 2 including: the steps of providing fastening members for attachment to said wing-shaped portions on opposite sides of said wedge shaped openings, respectively, and securing said fastening members on said wing-shaped portions so that said fastening members on the same side of said cap may be joined together to adjust the size of said cavity.
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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) | 1988-04-22 | 1988-10-22 | 1989-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-22 | 1992-10-22 | 1993-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-22 | 1996-10-22 | 1997-04-23 | $7700.00 | Window Closed / Lapsed |