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US3879845A Expired / Lapsed US ⏱️ 0.0 years remaining

Razor with a relatively moving blade and anvil assembly

Assignee: Mettoy Co Ltd
•
Filing: 1974-03-19
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Granted: 1975-04-29
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Expires: 1994-03-19
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Abstract

Abstract In a razor for dry shaving a cutting blade, of similar size to a conventional wet razor blade, is presented directly to the face to be shaved at a preferred shaving angle. An anvil (which may be a second cutting blade) provides a continuous edge, and relative movement between the cutting blade and the anvil effects cutting as a result of impact between the cutting edge of the cutting blade and hairs on the face while the hairs are supported by the continuous edge of the anvil. The relative movement between the cutting blade and the anvil must be such that no contact occurs between the cutting edge of the cutting blade and any part of the anvil.

Inventors

  • 👤 Bernard Stephen Hansom
  • 👤 Keith Douglas Ridler

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-26 16:40
CPC Classifications
B; B26; B26B; B26B19/00; B26B21/00; B26B21/08; B26B21/14

Claims Analysis

Total Claims: 13
Claim 1
Independent Claim 203 words
A razor comprising a shaving head which includes a fixed guard member having an end surface, means, including the end surface of the guard member, defining a first plane, a cutting blade mounted in the shaving head at a desired shaving angle, an exposed cutting edge on the cutting blade which exposed cutting edge is spaced from the end surface of the fixed guard member and which exposed cutting edge lies in the proximity of the said first plane, an anvil mounted in the shaving head adjacent the cutting edge, a continuous edge on the anvil, and means for effecting relative movement between the cutting blade and the anvil by causing at least one of the cutting edge and the continuous edge to be reciprocated in such manner that the said one edge passes through a second plane which contains the other edge and which is normal to the said first plane, the said continuous edge and the said cutting edge are in close proximity the one with the other at the instant of the said one edge passing through the second plane, and contact between the cutting edge and the anvil is avoided, whilst the cutting edge remains exposed throughout the reciprocation.
Claim 2
Dependent Claim 203 words
A razor comprising a shaving head which includes a fixed guard member having an end surface, means, including the end surface of the guard member, defining a first plane, a cutting blade mounted in the shaving head at a desired shaving angle, an exposed cutting edge on the cutting blade which exposed cutting edge is spaced from the end surface of the fixed guard member and which exposed cutting edge lies in the proximity of the said first plane, an anvil mounted in the shaving head adjacent the cutting edge, a continuous edge on the anvil, and means for effecting relative movement between the cutting blade and the anvil by causing at least one of the cutting edge and the continuous edge to be reciprocated in such manner that the said one edge passes through a second plane which contains the other edge and which is normal to the said first plane, the said continuous edge and the said cutting edge are in close proximity the one with the other at the instant of the said one edge passing through the second plane, and contact between the cutting edge and the anvil is avoided, whilst the cutting edge remains exposed throughout the reciprocation.
Claim 3
Dependent Claim 24 words
A razor according to claim 1 wherein the continuous edge of the anvil is substantially parallel to the cutting edge of the cutting blade.
Claim 4
Dependent Claim 28 words
A razor according to claim 1 wherein the cutting blade is rigidly mounted in the razor and the means for effecting relative movement effects movement of the anvil.
Claim 5
Dependent Claim 196 words
A razor comprising a shaving head which includes a fixed guard member having an end surface, a cutting blade fixedly mounted in the shaving head at a desirEd shaving angle and spaced from the guard member, an exposed cutting edge on the cutting blade, the exposed cutting edge being spaced from the end surface of the fixed guard member and the exposed cutting edge together with the end surface of the guard member defining a first plane, an anvil, a continuous edge on the anvil, moveable means mounting the anvil in the shaving head for movement relative to the cutting blade within the space between the guard member and the cutting blade, and means for moving the anvil such that the continuous edge is reciprocated to and fro through a second plane which contains the cutting edge and which is normal to the said first plane, the said continuous edge passes in close proximity to the said cutting edge at the instant that the said continuous edge passes through the second plane, and contact between the cutting edge and the anvil is avoided, whilst the cutting edge on the cutting blade remains exposed throughout the reciprocation.
Claim 6
Dependent Claim 196 words
A razor comprising a shaving head which includes a fixed guard member having an end surface, a cutting blade fixedly mounted in the shaving head at a desirEd shaving angle and spaced from the guard member, an exposed cutting edge on the cutting blade, the exposed cutting edge being spaced from the end surface of the fixed guard member and the exposed cutting edge together with the end surface of the guard member defining a first plane, an anvil, a continuous edge on the anvil, moveable means mounting the anvil in the shaving head for movement relative to the cutting blade within the space between the guard member and the cutting blade, and means for moving the anvil such that the continuous edge is reciprocated to and fro through a second plane which contains the cutting edge and which is normal to the said first plane, the said continuous edge passes in close proximity to the said cutting edge at the instant that the said continuous edge passes through the second plane, and contact between the cutting edge and the anvil is avoided, whilst the cutting edge on the cutting blade remains exposed throughout the reciprocation.
Claim 7
Dependent Claim 29 words
A razor according to claim 4 wherein the anvil having the continuous edge is mounted on a reed which is arranged for reciprocation by an electric exciter or vibrator.
Claim 8
Dependent Claim 186 words
A razor comprising a shaving head which includes a tuning fork having opposed arms, a cutting blade mounted on one of the opposed arms of the tuning fork at a desired shaving angle, an exposed cutting edge on the cutting blade, an anvil mounted on the other of the opposed arms of the tuning fork, a continuous edge on the anvil which is parallel to the cutting edge of the cutting blade, and an electric vibrator arranged to excite the tuning fork at a resonant frequency to cause movement of both the cutting edge and the continuous edge such that, at one stage of the excitation of the tuning fork, the cutting edge and the continuous edge are spaced apart and, at another stage in the excitation of the tuning fork, the cutting edge and the continuous edge pass in close proximity one with the other and the cutting blade and the anvil overlap, and contact between the cutting edge of the cutting blade and the anvil is avoided, whilst the cutting edge on the cutting blade remains exposed throughout the excitation of the tuning fork.
Claim 9
Dependent Claim 186 words
A razor comprising a shaving head which includes a tuning fork having opposed arms, a cutting blade mounted on one of the opposed arms of the tuning fork at a desired shaving angle, an exposed cutting edge on the cutting blade, an anvil mounted on the other of the opposed arms of the tuning fork, a continuous edge on the anvil which is parallel to the cutting edge of the cutting blade, and an electric vibrator arranged to excite the tuning fork at a resonant frequency to cause movement of both the cutting edge and the continuous edge such that, at one stage of the excitation of the tuning fork, the cutting edge and the continuous edge are spaced apart and, at another stage in the excitation of the tuning fork, the cutting edge and the continuous edge pass in close proximity one with the other and the cutting blade and the anvil overlap, and contact between the cutting edge of the cutting blade and the anvil is avoided, whilst the cutting edge on the cutting blade remains exposed throughout the excitation of the tuning fork.
Claim 10
Dependent Claim 24 words
A razor according to claim 6 wherein the continuous edge of the anvil is constituted by the cutting edge of a second cutting blade.
Claim 11
Dependent Claim 33 words
A razor according to claim 7 wherein the cutting edges on the first and second blades are ground on substantially one side only, the ground sides being presented to the face during shaving.
Claim 12
Dependent Claim 295 words
A razor comprising a shaving head which includes a fixed guard member having an end surface, a cutting blade fixedly mounted in the shaving head at a desired shaving angle and spaced from the guard member, an exposed cutting edge on the cutting blade, the exposed cutting edge being spaced from the end surface of the fixed guard member and the exposed cutting edge together with the end surface of the guard member defining a first plane, an anvil, a continuous edge on the anvil, a reed upon which the anvil is mounted in the shaving head with the continuous edge substantially perpendicular to the length of the reed and substantially parallel to the cutting edge of the cutting blade, means for causing the reed to reciprocate at a resonant frequency for movement of the anvil relative to the cutting blade within the space between the guard member and the cutting blade, such that the continuous edge is reciprocated to and fro through a second plane which contains the cutting edge and which is normal to the said first plane, the said continuous edge passes in close proximity to the cutting edge at the instant that the said continuous edge passes through the second plane, and contact between the cutting edge and the anvil is avoided, whilst the cutting edge on the cutting blade remains exposed throughout the reciprocation, and a resilient stop in the shaving head for abutting the reed during reciprocation of the reed after the continuous edge has passed through the second plaNe, the impact of the reed against the resilient stop causing a secondary motion of the continuous edge of the anvil away from the cutting blade, thereby ensuring the avoidance of contact between the continuous edge and the cutting blade.
Claim 13
Dependent Claim 295 words
A razor comprising a shaving head which includes a fixed guard member having an end surface, a cutting blade fixedly mounted in the shaving head at a desired shaving angle and spaced from the guard member, an exposed cutting edge on the cutting blade, the exposed cutting edge being spaced from the end surface of the fixed guard member and the exposed cutting edge together with the end surface of the guard member defining a first plane, an anvil, a continuous edge on the anvil, a reed upon which the anvil is mounted in the shaving head with the continuous edge substantially perpendicular to the length of the reed and substantially parallel to the cutting edge of the cutting blade, means for causing the reed to reciprocate at a resonant frequency for movement of the anvil relative to the cutting blade within the space between the guard member and the cutting blade, such that the continuous edge is reciprocated to and fro through a second plane which contains the cutting edge and which is normal to the said first plane, the said continuous edge passes in close proximity to the cutting edge at the instant that the said continuous edge passes through the second plane, and contact between the cutting edge and the anvil is avoided, whilst the cutting edge on the cutting blade remains exposed throughout the reciprocation, and a resilient stop in the shaving head for abutting the reed during reciprocation of the reed after the continuous edge has passed through the second plaNe, the impact of the reed against the resilient stop causing a secondary motion of the continuous edge of the anvil away from the cutting blade, thereby ensuring the avoidance of contact between the continuous edge and the cutting blade.

References Cited (Backward Citations)

US1455532A Cited
US1690133A Cited
US3065541A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-04-28 1978-10-28 1979-04-29 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-04-28 1982-10-28 1983-04-29 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-04-28 1986-10-28 1987-04-29 $7700.00 Window Closed / Lapsed

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