Patent US3835868A successfully refreshed from Google Patents.
US3835868A
Expired / Lapsed
US
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Method and apparatus for making hairpieces
Assignee: Individual
•
Filing: 1973-05-16
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Granted: 1974-09-17
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Expires: 1993-05-16
Abstract
Abstract Foundation fabric with attached hair strands is fitted over a heated human head shaped form. The strands are drawn by a vacuum to an erect position in which they extend away from the fabric at an abrupt angle. Liquid resin is applied to the bases of the erect strands by a syringe and is partially cured by the heat to tacky condition. The form is then heated to a higher temperature to completely cure the resin with the strands emerging therefrom at an abrupt angle. The form is hollow and has internal electrical resistance heating elements. When the form is made of a ferromagnetic metal, magnets are provided for securing the fabric to the form while applying the liquid resin.
Inventors
- 👤 W Heck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:39
CPC Classifications
A; A41; A41G; A41G3/00; A41G3/0075; A41G3/0077
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
25 words
The method defined in claim 1 wherein said certain strands are so positioned by applying thereto a stream of air flowing away from said fabric.
Claim 2
Dependent Claim
22 words
The method defined in claim 2 wherEin said stream of air is applied by positioning a vacuum head near to said fabric.
Claim 3
Dependent Claim
27 words
The method defined in claim 3 wherein said vacuum head is positioned near the side of said fabric opposite the side which is fitted to said form.
Claim 4
Dependent Claim
27 words
The method defined in claim 1 wherein said resin is so applied by ejecting it from the orifice of a hollow needle positioned closely adjacent said fabric.
Claim 5
Dependent Claim
35 words
The method defined in claim 5 wherein said resin is so applied both between said fabric and form and to the side of said fabric opposite to the side which is fitted against said form.
Claim 6
Dependent Claim
27 words
The method defined in claim 1 and including in addition the step of coating said form with liquid resin prior to fitting said fabric against said form.
Claim 7
Dependent Claim
39 words
The method defined in claim 7 wherein in said applying step additional liquid resin is applied both between said fabric and form and to the side of said fabric opposite to the side which is fitted against said form.
Claim 8
Dependent Claim
23 words
The method defined in claim 5 wherein said liquid resin is so ejected by a syringe of which said needle is a part.
Claim 9
Dependent Claim
43 words
The method defined in claim 1 wherein said resin is partially cured to tacky condition during said applying step by heating said resin to a relatively low temperature, and thereafter said resin is completely cured by heating the same to a higher temperature.
Claim 10
Dependent Claim
41 words
The method defined in claim 10 wherein said resin comprises a polyvinyl chloride material, said relatively low temperature being in the range of about 140* to about 150*, said higher temperature being in the range of about 350* to about 375*.
Claim 11
Dependent Claim
27 words
The method defined in claim 1 and including in addition the step of heating said form and utilizing the heat from said form to cure said resin.
Claim 12
Dependent Claim
15 words
The method defined in claim 12 wherein said form is heated by utilizing electrical resistance.
Claim 13
Dependent Claim
36 words
The method defined in claim 13 wherein said form has the general shape of a human head and has a hollow interior, said electrical resistance being utilized by providing electrical resistance heating means within said interior.
Claim 14
Dependent Claim
28 words
The method defined in claim 1 wherein said form is magnetically attractive, said fabric being so maintained against said form by utilizing the magnetic attraction of said form.
Claim 15
Dependent Claim
48 words
The method defined in claim 15 wherein a plurality of elements are provided which are mutually magnetically attractive with said form, said maintaining step being accomplished by applying said elements to portions of that side of the fabric opposite to the side which is fitted against said form.
Claim 16
Dependent Claim
20 words
The method defined in claim 16 wherein said form is made of a ferromagnetic material and said elements comprise magnets.
Claim 17
Independent Claim
177 words
The method of making a hairpiece which comprises providing a form contoured to simulate the shape of a human head, providing a quantity of liquid resin partially curable to tacky condition at a relatively low temperature and completely curable at a higher temperature, providing a foundation fabric with strands of hair attached thereto, heating said form to said lower temperature, fitting said fabric against said form, applying to at least certain of said strands a stream of air flowing away from said fabric and thereby positioning said certain strands so that they extend away from said fabric at an abrupt angle, while maintaining said form at said lower temperature and maintaining said certain strands so positioned, applying to the attachments of said strands to said fabric and to the fabric contiguous thereto said liquid resin, utilizing the heat from said form to partially cure said additional resin, thereafter heating said form to said higher temperature and utilizing the higher heat to completely cure all of said applied resin, and then removing the resulting assembly from said form.
Claim 18
Dependent Claim
132 words
Apparatus for use in making hairpieces which comprises, a form made of a heat conducting metal and having generally the shape of A human head, said form having outer surface portions adapted to be coated in nonbonding relation with a heat curable liquid resin, said form having a hollow interior, electrical resistance heating means within said interior operable to heat interior surface portions of said form, said interior and exterior surface portions being so relatively disposed that when said interior surface portions are heated said exterior portions are heated by conduction for curing a resin contiguous thereto, and electrical control means co-operable with said heating means and heat conductive metal to heat said outer surface portions to selected temperatures at least up to the complete curing temperature of a resin contiguous thereto.
Claim 19
Dependent Claim
32 words
The apparatus defined in claim 19 wherein said heating means comprises at least one looped heating element having portions disposed in heat transmitting relation to said interior surface portions of said form.
Claim 20
Dependent Claim
11 words
The apparatus defined in claim 19 wherein said metal comprises aluminum.
Claim 21
Dependent Claim
13 words
The apparatus defined in claim 19 wherein said metal comprises a ferromagnetic metal.
Claim 22
Dependent Claim
36 words
The apparatus defined in claim 22 and including in addition a plurality of magnets adapted to be engaged against a hair-strand-bearing fabric fitted to the exterior of said form for retaining said fabric in place thereon.
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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) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |