Patent US4880428A successfully refreshed from Google Patents.
← Back to Patent Explorer
US4880428A Expired / Lapsed US ⏱️ 0.0 years remaining

Matted (delustered) artificial hair

Assignee: Individual
•
Filing: 1988-04-19
•
Granted: 1989-11-14
•
Expires: 2008-04-19
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract A matted (delustered) artificial hair which is disclosed herein comprises a fiber made of a synthetic resin. A large number of irregular scrubbed flaws is formed circumferentially on the surface of a monofilament having a substantially circular section. A method for preparation of such an artificial hair which method comprises placing a bundle of monofilaments of a synthetic fiber and each having a substantially circular section between two abrasive-coated plates each having a soft layer on a surface thereof, and allowing the two abrasive-coated plates to reciprocate in the opposite directions at an angle of 45° to 90° with respect to the longitudinal direction of the monofilament while applying a slight pressure in the presence of an abrasive, whereby a large number of scrubbed flaws is formed circumferentially on the surface of each monofilament.

Inventors

  • 👤 Shiro Yamada

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-06 01:31
CPC Classifications
A; A41; A41G; A41G3/00; A41G3/0083; A61; A61F; A61F2/00; A61F2/02; A61F2/10; D; D02; D02J; D02J3/00; D02J3/02

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 79 words
An artificial hair having a delustered surface closely similar in gloss to that of human hair, comprising a melt-spun synthetic resin monofilament having a generally circular cross-section and an exterior surface having a large number of scrubbed flaws of irregular size and shape extending generally circumferentially about said monofilament, said scrubbed flaws extending transverse to the length of said monofilament, the surface of said monofilament being substantially devoid of scrubbed flaws extending in the longitudinal direction of said monofilament.
Claim 2
Dependent Claim 79 words
An artificial hair having a delustered surface closely similar in gloss to that of human hair, comprising a melt-spun synthetic resin monofilament having a generally circular cross-section and an exterior surface having a large number of scrubbed flaws of irregular size and shape extending generally circumferentially about said monofilament, said scrubbed flaws extending transverse to the length of said monofilament, the surface of said monofilament being substantially devoid of scrubbed flaws extending in the longitudinal direction of said monofilament.
Claim 3
Dependent Claim 37 words
A matted (delustered) artificial hair according to claim 1, wherein said large number of scrubbed flaws extend circumferentially at an angle in a range of 45° to 90° with respect to the longitudinal direction of the monofilament.
Claim 4
Dependent Claim 24 words
A matted (delustered) artificial hair is produced according to claim 1, wherein the maximum depth of said scrubbed flaws of 20 μm or less.
Claim 5
Dependent Claim 26 words
An artificial hair according to claim 1 wherein said synthetic resin is selected from the group consisting of polyamides, polyvinyl chloride, polypropylene, polyacrylic and polyester resins.
Claim 6
Dependent Claim 20 words
An artificial hair according to claim 1 wherein said scrubbed flaws have an average depth of 0.1 to 10 μm.
Claim 7
Dependent Claim 13 words
An artificial hair according to claim 1 having a diameter of 60-110 μm.

References Cited (Backward Citations)

US1957508A Cited
DE1254816B Cited
FR2087152A5 Cited
JPS4737649U Cited
JPS48305U Cited
JPS4957116A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1992-11-13 1993-05-15 1993-11-14 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1996-11-13 1997-05-15 1997-11-14 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2000-11-13 2001-05-15 2001-11-14 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag