US3890704A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Razor blade cartridge
Assignee: Warner Lambert Co LLC
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Filing: 1974-01-14
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Granted: 1975-06-24
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Expires: 1994-01-14
Abstract
Abstract The specific disclosure provides a razor blade cartridge comprising a plastic blade seat member, a blade and a cap member. The seat and the blade have transversely spaced and transversely elongated apertures. The cap has at least two posts extending downwardly through the apertures. The posts initially have an outer longitudinal dimension equal to or greater than the longitudinal dimensions of the apertures, and an outer transverse dimension less than the transverse dimensions of the apertures to provide a longitudinal interference fit of the posts in the apertures. The longitudinal interference fit aligns the blade cutting edge with respect to a transversely elongated guard surface on the seat.
Inventors
- 👤 Frank A Ferraro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:17
CPC Classifications
B; B26; B26B; B26B21/00; B26B21/08; B26B21/14; B26B21/22; B26B21/222; B26B21/02; B26B21/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
234 words
A razor blade cartridge comprising: a. a plastic blade seat member including a transversely elongated guard surface defining a front surface of said blade seat member, and at least two transversely spaced perforations therethrough, each one of said perforations being transversely elongated and having a first longitudinal dimension; b. a first blade located on said blade seat member including a forward cutting edge spaced upwardly and rearwardly of said guard surface, and at least two transversely spaced apertures, each one of said first blade apertures being transversely elongated and having a second longitudinal dimension greater than said first dimension; c. a spacer member located on said first blade including at least two transversely spaced holes; d. a second blade located on said spacer member including a forward cutting edge spaced upwardly and rearwardly of the forward cutting edge of said first blade, and at least two transversely spaced apertures, each one of said second blade apertures being transversely elongated and having a third longitudinal dimension greater than said second dimension; and e. a cap member located above said second blade and including at least two plastic posts extending downwardly through saId apertures, said holes and said perforations, said posts initially having a longitudinal outer dimension equal to or greater than the longitudinal dimensions of said apertures and said perforations to provide a longitudinal interference fit of said posts in said apertures and said perforations.
Claim 2
Dependent Claim
234 words
A razor blade cartridge comprising: a. a plastic blade seat member including a transversely elongated guard surface defining a front surface of said blade seat member, and at least two transversely spaced perforations therethrough, each one of said perforations being transversely elongated and having a first longitudinal dimension; b. a first blade located on said blade seat member including a forward cutting edge spaced upwardly and rearwardly of said guard surface, and at least two transversely spaced apertures, each one of said first blade apertures being transversely elongated and having a second longitudinal dimension greater than said first dimension; c. a spacer member located on said first blade including at least two transversely spaced holes; d. a second blade located on said spacer member including a forward cutting edge spaced upwardly and rearwardly of the forward cutting edge of said first blade, and at least two transversely spaced apertures, each one of said second blade apertures being transversely elongated and having a third longitudinal dimension greater than said second dimension; and e. a cap member located above said second blade and including at least two plastic posts extending downwardly through saId apertures, said holes and said perforations, said posts initially having a longitudinal outer dimension equal to or greater than the longitudinal dimensions of said apertures and said perforations to provide a longitudinal interference fit of said posts in said apertures and said perforations.
Claim 3
Dependent Claim
13 words
The cartridge of claim 1 wherein said spacer member holes are transversely elongated.
Claim 4
Dependent Claim
38 words
The cartridge of claim 1 wherein each one of said posts has a lower cylindrical portion and an upper cylindrical portion, the diameter of said upper cylindrical portion being greater than the diameter of said lower cylindrical portion.
Claim 5
Dependent Claim
25 words
The cartridge of claim 3 wherein each one of said posts has an upwardly and outwardly beveled portion interconnecting said upper and lower cylindrical portions.
Claim 6
Dependent Claim
24 words
The cartridge of claim 1 wherein said posts are deformed at the lower ends thereof to prevent removal of said posts from said perforations.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-23 | 1978-12-23 | 1979-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-23 | 1982-12-23 | 1983-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-23 | 1986-12-23 | 1987-06-24 | $7700.00 | Window Closed / Lapsed |