US4489627A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Razors and shaving units for razors
Assignee: Wilkinson Sword Ltd
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Filing: 1982-01-25
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Granted: 1984-12-25
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Expires: 2002-01-25
Abstract
Abstract A double edged strip of blade metal is parted along a center line and cropped to form two strips each containing a series of spaced apart blades connected by webs to an elongate backing strip of blade metal. Each strip is fed into a moulding machine in which a razor, or a shaving unit, or a blade-containing component of a shaving unit is moulded directly on to each individual blade. Each web is then parted to release the moulded razor, shaving unit, or shaving unit component, from the backing strip.
Inventors
- 👤 Max A. Lembke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:11
CPC Classifications
B; B26; B26B; B26B21/00; B26B21/08; B26B21/14; B26B21/16; B26B21/54; B29; B29C; B29C70/00; B29C70/68; Y; Y10; Y10S; Y10S76/00; Y10S76/08
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
129 words
A process for the manufacture of razors or shaving units for razors, which comprises forming a strip of blade metal with at least two cutting edges, wherein the strip of blade metal is formed with a plurality of elongate aperatures extending along the strip, the blade edges being provided on portions of the strip which are separated from the remainder of the strip by webs extending between the aperatures, introducing the strip into a mold cavity and molding plastics material directly on to the strip to form the plastics portion of a razor or shaving unit on each cutting edge or on both cutting edges, the plastics portions being spaced apart, and cropping at least part of said webs to release the razors or shaving units from each other.
Claim 2
Dependent Claim
129 words
A process for the manufacture of razors or shaving units for razors, which comprises forming a strip of blade metal with at least two cutting edges, wherein the strip of blade metal is formed with a plurality of elongate aperatures extending along the strip, the blade edges being provided on portions of the strip which are separated from the remainder of the strip by webs extending between the aperatures, introducing the strip into a mold cavity and molding plastics material directly on to the strip to form the plastics portion of a razor or shaving unit on each cutting edge or on both cutting edges, the plastics portions being spaced apart, and cropping at least part of said webs to release the razors or shaving units from each other.
Claim 3
Dependent Claim
49 words
A process according to claim 1 wherein a single cutting edge is formed along at least one side of the strip of blade metal and individual cutting edges are formed from said cutting edge by cropping out portions of the edge of the strip at intervals along its length.
Claim 4
Dependent Claim
50 words
A process according to claim 1 wherein each web extends from a completed razor or shaving unit via a recess in the plastics molding and the cropping of the web takes place in said recess so that the cropped edge of the web is screened by the adjacent plastics material.
Claim 5
Dependent Claim
41 words
A process according to claim 1 wherein the blade strip is cropped to form shaving units each with at least one web of blade metal protruding therefrom by means of which the shaving unit can be secured to a razor handle.
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) | 1987-12-25 | 1988-06-25 | 1988-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-25 | 1992-06-25 | 1992-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-25 | 1996-06-25 | 1996-12-25 | $7700.00 | Window Closed / Lapsed |