US5001832A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Razor blade unit
Assignee: Edgewell Personal Care Brands LLC
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Filing: 1988-08-24
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Granted: 1991-03-26
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Expires: 2008-08-24
Abstract
Abstract A razor blade unit includes a plastic support member having a guide surface and a top cap. At least one razor blade having a cutting edge is embedded in the support member. At least one freely rotatable cylindrical roller is attached axially to the support member and extends parallel to the cutting edge of the razor blade to engage a skin area. A cylindrical roller has a lower coefficient of friction than the plastic support member. The cylindrical roller was preferably made of metal and is located in the guide surface and/or in the top cap of the razor blade unit.
Inventors
- 👤 Wolfgang Althaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:02
CPC Classifications
B; B26; B26B; B26B21/00; B26B21/40; B26B21/08; B26B21/14; B26B21/22
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
128 words
A razor blade unit having first and second sides opposite to each other, the razor blade unit comprising: a plastic support member having a stationary plastic surface for engaging the skin on the first side of the razor blade unit; at least one razor blade secured to the plastic support member and having a cutting edge extending from the plastic support member between the first and second sides; at least one freely rotatable cylindrical metal roller attached axially to the plastic support member and extending parallel to the cutting edge of said at least one razor blade on the second side of the razor blade unit, said metal roller having a lower coefficient of friction against the skin area than the stationary plastic surface of the support member.
Claim 2
Dependent Claim
128 words
A razor blade unit having first and second sides opposite to each other, the razor blade unit comprising: a plastic support member having a stationary plastic surface for engaging the skin on the first side of the razor blade unit; at least one razor blade secured to the plastic support member and having a cutting edge extending from the plastic support member between the first and second sides; at least one freely rotatable cylindrical metal roller attached axially to the plastic support member and extending parallel to the cutting edge of said at least one razor blade on the second side of the razor blade unit, said metal roller having a lower coefficient of friction against the skin area than the stationary plastic surface of the support member.
Claim 3
Dependent Claim
38 words
A razor blade unit as set forth in claim 1 wherein said at least one cylindrical roller includes a cylindrical roller located in the stationary plastic surface in front of the razor blade in the direction of shaving.
Claim 4
Dependent Claim
161 words
A razor blade unit for movement across a skin area in a shaving direction, the razor blade unit comprising: a plastic support member having a stationary guide surface; at least one razor blade embedded in said support member and having a cutting edge extending parallel to said guide surface, said guide surface being disposed to contact the skin area ahead of the razor blade when the razor blade unit is moved in the shaving direction; a protective cap disposed on said support member, said protective cap being arranged on a side of said cutting edge opposite said guide surface; and a cylindrical metal roller rotatably supported on said protective cap and projecting therefrom, said cylindrical metal roller extending parallel to the edge of the razor blade and being arranged to contact the skin area after the guide surface and the razor blade contact the skin area when the razor blade unit is moved in the shaving direction across the skin area.
Claim 5
Dependent Claim
161 words
A razor blade unit for movement across a skin area in a shaving direction, the razor blade unit comprising: a plastic support member having a stationary guide surface; at least one razor blade embedded in said support member and having a cutting edge extending parallel to said guide surface, said guide surface being disposed to contact the skin area ahead of the razor blade when the razor blade unit is moved in the shaving direction; a protective cap disposed on said support member, said protective cap being arranged on a side of said cutting edge opposite said guide surface; and a cylindrical metal roller rotatably supported on said protective cap and projecting therefrom, said cylindrical metal roller extending parallel to the edge of the razor blade and being arranged to contact the skin area after the guide surface and the razor blade contact the skin area when the razor blade unit is moved in the shaving direction across the skin area.
Claim 6
Dependent Claim
20 words
A razor blade unit as set forth in claim 3 wherein the roller is arranged rigidly in the support member.
References Cited (Backward Citations)
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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) | 1994-03-25 | 1994-09-24 | 1995-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-03-25 | 1998-09-24 | 1999-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-03-25 | 2002-09-24 | 2003-03-26 | $7700.00 | Window Closed / Lapsed |