GB1603044A - Dry-shaving apparatus - Google Patents

Dry-shaving apparatus Download PDF

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Publication number
GB1603044A
GB1603044A GB1694978A GB1694978A GB1603044A GB 1603044 A GB1603044 A GB 1603044A GB 1694978 A GB1694978 A GB 1694978A GB 1694978 A GB1694978 A GB 1694978A GB 1603044 A GB1603044 A GB 1603044A
Authority
GB
United Kingdom
Prior art keywords
hair
shaving
blade
cutter
pulling
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB1694978A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Priority to GB1694978A priority Critical patent/GB1603044A/en
Publication of GB1603044A publication Critical patent/GB1603044A/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B19/00—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers
    • B26B19/38—Details of, or accessories for, hair clippers, or dry shavers, e.g. housings, casings, grips, guards
    • B26B19/42—Details of, or accessories for, hair clippers, or dry shavers, e.g. housings, casings, grips, guards providing for straightening the hair to be cut, e.g. by means of bristles; providing for tensioning the skin, e.g. by means of rollers, ledges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B19/00—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers
    • B26B19/14—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers of the rotary-cutter type; Cutting heads therefor; Cutters therefor
    • B26B19/16—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers of the rotary-cutter type; Cutting heads therefor; Cutters therefor involving a knife cylinder or a knife cone or separate cutting elements moved like a rotating cylinder or a rotating cone
    • B26B19/18—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers of the rotary-cutter type; Cutting heads therefor; Cutters therefor involving a knife cylinder or a knife cone or separate cutting elements moved like a rotating cylinder or a rotating cone in combination with a fixed razor-blade without shearing perforations

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Dry Shavers And Clippers (AREA)

Description

(54) DRY-SHAVING APPARATUS (71) We, N.V. PHILIPS' GLOEILAM PENFABRIEKEN, a limited liability Company, organised and established under the laws of the Kingdom of the Netherlands, of Emmasingel 29, Eindhoven, the Netherlands, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement: This invention relates to a dry-shaving apparatus having a rotatable cutting member and a stationary shear plate.
United States Patent Specification No.
664,388 discloses a dry-shaving apparatus having a rotatable cutter roller comprising a plurality of shaving cutters with cutting edges, and a stationary skin guide member and stationary shear cutting member between which a hair-entry slot is formed.
According to the present invention there is provided a dry-shaving apparatus having a rotatable cutting member comprising a plurality of shaving cutters which are spaced from one another about the axis of rotation of the cutting member and each of which has a cutting edge, the apparatus further comprising a curved stationary skin guide plate and a curved stationary shear plate having a cutting edge with which the cutting edges of the shaving cutters cooperate in the operation of the apparatus and which in conjunction with an opposing edge of the skin guide plate defines a hair-entry slot, wherein the cutting edge of each shaving cutter extends parallel to the axis of rotation of the cutting member and the hair-entry slot extends helically with resPect to this axis, and wherein a hair-pulting blade is arranged in front of each shaving cutter with respect to the direction of movement of the cutter about said axis, each hair-pulling blade being arranged to move with the associated cutter about this axis but to be movable relative to the cutter in directions away from and towards the skin guide plate and shear plate as the cutter traverses these plates in the operation of the apparatus, such movement of the hair-pulling blades away from said plates being opposed by resilient means, and each hair-pulling blade having an edge which extends parallel to the axis of rotation of the cutting member and which, as the blade moves over the skin guide plate and shear plate in the operation of the apparatus, is engageable with hairs that protrude through the hair-entry slot.
Hair-pulling blades are known per se from United States Patent Specification 3,088,205, but the use thereof in conjunction with the helical shaving cutters known from United States Patent Specification 644,388 is very difficult. In a dry-shaving apparatus according to the invention the helical shape of the hair-entry slot permits the use of hair-pulling blades with hairengaging edges which extend parallel to the axis of rotation of the cutting member without the risk of these edges catching in the hair-entry slot.
Preferably, always the cutting edge of at least one shaving cutter co-operates with the cutting edge of the shear plate.
An embodiment of the invention will now be described in more detail with reference to the accompanying drawings, in which: Figure 1 is a perspective view of a shaving apparatus according to an embodiment of the invention Figure 2 is a cross-section of the shaving head of the apparatus of Figure 1 drawn to a slight larger scale and taken on the line II-II in Figure 1, Figures 3 - 5 are schematic side views, drawn to a very much larger scale, of a shaving cutter and associated hair-pulling blade of the shaving apparatus of Figures 1 and 2, illustrating the operation of the hair-pulling blade, and Figure 6 is a perspective view of a hair-pulling blade having a plurality of independently movable sections.
The dry-shaving apparatus shown in Figures 1 and 2 compnses a housing 1 on which a guard 2 is clamped. In the upPer part of the housing 1 a cutting member 3 is rotatably journalled on a spindle 4. The cutting member 3 is driven by a motor (not shown accommodated in the housing 1 via a transmission (not shown). The cutting member 3 comprises a plurality of shaving cutters 5 which are spaced about the axis of the spindle 4 and which have straight cutting edges 6 which extend parallel to the spindle 4. Associated with each shaving cutter 5 is a hair-pulling blade 7 which is disposed in front of the associated shaving cutter with respect to the direction of movement P of the cutter about the axis of spindle 4. The length of the hair-pulling blades 7 in the axial direction of the cutting member is equal to that of the shaving cutters.Each hair-pulling blade 7 is formed by a strip of basicalicannel section with an inclined side wail. The portion 8 of the blade which is formed by the other side wall of the strip cooperates with the associated shaving cutter 5 and has a sharp edge 10 which is disposed directly in front of the cutting edge 6 of the shaving cutter and extends parallel to the spindle 4. The portion 9 of the blade which is formed by the inclined wall of the strip is attached to the rear side of the preceding shaving cutter.The construction of the hair-pulling blades 7 is such that each blade is resiliently deflexible to enable the portion 8 of the blade to move relative to the associated shaving cutter 5 in directions away from and towards a curved stationary skin guide plate 11 and a curved stationary shear plate 12 as the hair-pulling blade and shaving cutter traverse these plates in the operation of the apparatus. The skin guide plate 11 and the shear plate 12 are mounted in the guard 2, the shear plate being hingedly mounted and being urged against the cutting member 3 by a spring 14. The shear plate 12 has a cutting edge 13 with which the cutting edges 6 of the shaving cutters 5 cooperate in the operation of the apparatus and which in conjunction with an opposing edge of the skin guide plate defines a hair-entry slot 15.This slot extends helically with respect to the axis of the spindle 4 and with a pitch such that always tecutting edge 6 of at least one shaving cutter cooperates with the cutting edge 13 of the shear plate 12 so that this edge of the shear plate cannot enter the space between two adjacent shaving cutters under the action of the spring 14. The helical form of the hair-entry slot 15 also ensures that the hair-pulling blades cannot catch in the hairentry slot.
The width of the slot 15 is large enough to allow all hairs that enter the slot to raise themselves into erect portions but small enough to ensure that the skin is not touched by the moving shaving cutters. It is possible to make the width of the hair-entry slot adjustable. It is also possible to have a shaving apparatus with a pluraliry of hairentry slots.
The operation of a hair-pulling blade 7 is illustrated in Figures 3 - 5. Figure 3 shows the situation in which a hair 16 projects through the hair-entry slot 15 and is just pressed against the cutting edge 13 of the shear plate 12 by the sharp edge 10 of the hair-pulling blade. In Figure 4 the hairpulling blade has advanced slightly with the associated shaving cutter 5 in the direction of the arrow P. The sharp edge 10 of the blade 7 has slightly penetrated the hair 16 and the blade has been deflected away from the shear plate 12 against the resilience of the blade by this reaction force from the hair and has pulled the hair slightly out of the skin 17. The hair is then cut off by the shaving cutter 5. Figure 5 shows the hair cut off and the root withdrawn by the natural elasticity of the surrounding skin tissue to a level below that of the surrounding skin surface.
At the side which contacts the skin the shear plate 11 and skin guide plate 12 may be provided with raised surface portions 11' and 12' near the hair-entry slot to serve as skin-tightening elements.
Preferably, each hair-pulling blade 7 is in sliding contact with the inclined front surface 5' of the associated shaving cutter 5.
Each hair-pulling blade may be divided into a plurality of independently movable resilient sections, as shown in Figure 6. It is obvious that the individual sections should not be able to enter the hair-entry slot.
WHAT WE CLAIM IS: 1. A dry-shaving apparatus having a rotatable cutting member comprising a plur- ality of shaving cutters which are spaced from one another about the axis of rotation of the cutting member and each of which has a cutting edge, the apparatus further comprising a curved stationary skin guide plate and a curved stationary shear plate having a cutting edge with which the cutting edges of the shaving cutters cooperate in the operation of the apparatus and which in conjunction with an opposing edge of the skin guide plate defines a hair-entry slot, wherein the cutting edge of each shaving cutter extends parallel to the axis of rotation of the cutting member and the hair-entry slot extends helically with respect to this axis, and wherein a hair-pulling blade is arranged in front of each shaving cutter with respect to the direction of movement of the cutter about said axis, each hair-pulling blade being arranged to move with the associated
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (3)

**WARNING** start of CLMS field may overlap end of DESC **. hair-pulling blade having a plurality of independently movable sections. The dry-shaving apparatus shown in Figures 1 and 2 compnses a housing 1 on which a guard 2 is clamped. In the upPer part of the housing 1 a cutting member 3 is rotatably journalled on a spindle 4. The cutting member 3 is driven by a motor (not shown accommodated in the housing 1 via a transmission (not shown). The cutting member 3 comprises a plurality of shaving cutters 5 which are spaced about the axis of the spindle 4 and which have straight cutting edges 6 which extend parallel to the spindle 4. Associated with each shaving cutter 5 is a hair-pulling blade 7 which is disposed in front of the associated shaving cutter with respect to the direction of movement P of the cutter about the axis of spindle 4. The length of the hair-pulling blades 7 in the axial direction of the cutting member is equal to that of the shaving cutters.Each hair-pulling blade 7 is formed by a strip of basicalicannel section with an inclined side wail. The portion 8 of the blade which is formed by the other side wall of the strip cooperates with the associated shaving cutter 5 and has a sharp edge 10 which is disposed directly in front of the cutting edge 6 of the shaving cutter and extends parallel to the spindle 4. The portion 9 of the blade which is formed by the inclined wall of the strip is attached to the rear side of the preceding shaving cutter.The construction of the hair-pulling blades 7 is such that each blade is resiliently deflexible to enable the portion 8 of the blade to move relative to the associated shaving cutter 5 in directions away from and towards a curved stationary skin guide plate 11 and a curved stationary shear plate 12 as the hair-pulling blade and shaving cutter traverse these plates in the operation of the apparatus. The skin guide plate 11 and the shear plate 12 are mounted in the guard 2, the shear plate being hingedly mounted and being urged against the cutting member 3 by a spring 14. The shear plate 12 has a cutting edge 13 with which the cutting edges 6 of the shaving cutters 5 cooperate in the operation of the apparatus and which in conjunction with an opposing edge of the skin guide plate defines a hair-entry slot 15.This slot extends helically with respect to the axis of the spindle 4 and with a pitch such that always tecutting edge 6 of at least one shaving cutter cooperates with the cutting edge 13 of the shear plate 12 so that this edge of the shear plate cannot enter the space between two adjacent shaving cutters under the action of the spring 14. The helical form of the hair-entry slot 15 also ensures that the hair-pulling blades cannot catch in the hairentry slot. The width of the slot 15 is large enough to allow all hairs that enter the slot to raise themselves into erect portions but small enough to ensure that the skin is not touched by the moving shaving cutters. It is possible to make the width of the hair-entry slot adjustable. It is also possible to have a shaving apparatus with a pluraliry of hairentry slots. The operation of a hair-pulling blade 7 is illustrated in Figures 3 - 5. Figure 3 shows the situation in which a hair 16 projects through the hair-entry slot 15 and is just pressed against the cutting edge 13 of the shear plate 12 by the sharp edge 10 of the hair-pulling blade. In Figure 4 the hairpulling blade has advanced slightly with the associated shaving cutter 5 in the direction of the arrow P. The sharp edge 10 of the blade 7 has slightly penetrated the hair 16 and the blade has been deflected away from the shear plate 12 against the resilience of the blade by this reaction force from the hair and has pulled the hair slightly out of the skin 17. The hair is then cut off by the shaving cutter 5. Figure 5 shows the hair cut off and the root withdrawn by the natural elasticity of the surrounding skin tissue to a level below that of the surrounding skin surface. At the side which contacts the skin the shear plate 11 and skin guide plate 12 may be provided with raised surface portions 11' and 12' near the hair-entry slot to serve as skin-tightening elements. Preferably, each hair-pulling blade 7 is in sliding contact with the inclined front surface 5' of the associated shaving cutter 5. Each hair-pulling blade may be divided into a plurality of independently movable resilient sections, as shown in Figure 6. It is obvious that the individual sections should not be able to enter the hair-entry slot. WHAT WE CLAIM IS:
1. A dry-shaving apparatus having a rotatable cutting member comprising a plur- ality of shaving cutters which are spaced from one another about the axis of rotation of the cutting member and each of which has a cutting edge, the apparatus further comprising a curved stationary skin guide plate and a curved stationary shear plate having a cutting edge with which the cutting edges of the shaving cutters cooperate in the operation of the apparatus and which in conjunction with an opposing edge of the skin guide plate defines a hair-entry slot, wherein the cutting edge of each shaving cutter extends parallel to the axis of rotation of the cutting member and the hair-entry slot extends helically with respect to this axis, and wherein a hair-pulling blade is arranged in front of each shaving cutter with respect to the direction of movement of the cutter about said axis, each hair-pulling blade being arranged to move with the associated
cutter about this axis but to be movable relative to the cutter in directions away from and towards the skin guide plate and shear plate as the cutter traverses these plates in the operation of the apparatus, such movement of the hair-pulling blades away from said plates being opposed by resilient means, and each hair-pulling blade having an edge which extends parallel to the axis of rotation of the cutting member and which, as the blade moves over the skin guide plate and shear platee in the operation of the apparatus, is engageable with hairs that protrude through the hair-entry slot.
2. A dry-shaving apparatus as claimed in Claim 1, wherein always the cutting edge of at least one showing cutter co-operates with the cutting edge of the shear plate.
3. A dry-shaving apparatus substantially as herein described with reference to the accompanying drawings.
GB1694978A 1978-04-28 1978-04-28 Dry-shaving apparatus Expired GB1603044A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1694978A GB1603044A (en) 1978-04-28 1978-04-28 Dry-shaving apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1694978A GB1603044A (en) 1978-04-28 1978-04-28 Dry-shaving apparatus

Publications (1)

Publication Number Publication Date
GB1603044A true GB1603044A (en) 1981-11-18

Family

ID=10086567

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1694978A Expired GB1603044A (en) 1978-04-28 1978-04-28 Dry-shaving apparatus

Country Status (1)

Country Link
GB (1) GB1603044A (en)

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19960428