Hand-held safety holder for a single-edge razor blade for cutting a sheet or strand
First Claim
1. A hand-held safety holder for a single-edge razor blade, for cutting a thin sheet or strand, comprising:
- an elongated member having proximal and distal ends, with a planar, blade-holding part disposed toward said distal end and a part for grasping with the hand disposed toward the other,said planar part having about the same thickness as the guard of the razor blade and first and second sides,said planar part having a rectangular aperture therethrough which is slightly larger than the guard of the razor blade for retaining the blade against movement in the plane of the planar part during cutting,said planar part having an internal, blade-receiving recess which is slightly larger than the blade part of the razor blade, extending downward from said aperture, in the plane of said planar part, and between said first and second sides, said first side being relieved for a portion of its depth below said rectangular aperture to permit the insertion and removal of the blade part of the razor blade between said first and second sides, and to retain the blade therebetween against lateral movement during cutting,said planar part having a slotted opening at the lower edge thereof, extending distally-inward to said recess to expose a portion of the cutting edge of the blade, to guide the sheet or strand into cutting contact with said exposed portion of the blade at an angle of incidence with respect to the blade when said knife is drawn across the edge of the sheet or strand, said slotted opening having a width and depth sufficient to permit the edgewise passage of the sheet or strand into said cutting contact with said blade and to prevent said cutting contact with any part of the hand,said planar part having an elongated finger with a tapered end extending proximally-outward therefrom, below said lower edge and parallel to said slotted opening, having a proximal edge coincident with the distal edge of said slotted opening, to hook the sheet or strand into initial engagement within said slotted opening.
3 Assignments
0 Petitions
Accused Products
Abstract
A holder is described which holds a conventional, single-edge razor blade and permits the blade to be held safely in the hand and used to cut thin, elongated articles, such as sheets or strands by drawing the blade into edgewise contact with the sheet or strand. The cutting edge of the blade is protected except for a portion thereof, which is exposed at the end of a guide slot in the holder, which serves both to guide the article being cut into cutting contact with the blade at an optimum angle of incidence with respect to the blade, and to prevent other articles and parts of the hand from being cut accidently. The blade is replaceable without tools and is reversible to use portions of both ends. A finger extends outward from the holder and parallel to the guide slot to hook the article to be cut into initial engagement into the guide slot.
79 Citations
10 Claims
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1. A hand-held safety holder for a single-edge razor blade, for cutting a thin sheet or strand, comprising:
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an elongated member having proximal and distal ends, with a planar, blade-holding part disposed toward said distal end and a part for grasping with the hand disposed toward the other, said planar part having about the same thickness as the guard of the razor blade and first and second sides, said planar part having a rectangular aperture therethrough which is slightly larger than the guard of the razor blade for retaining the blade against movement in the plane of the planar part during cutting, said planar part having an internal, blade-receiving recess which is slightly larger than the blade part of the razor blade, extending downward from said aperture, in the plane of said planar part, and between said first and second sides, said first side being relieved for a portion of its depth below said rectangular aperture to permit the insertion and removal of the blade part of the razor blade between said first and second sides, and to retain the blade therebetween against lateral movement during cutting, said planar part having a slotted opening at the lower edge thereof, extending distally-inward to said recess to expose a portion of the cutting edge of the blade, to guide the sheet or strand into cutting contact with said exposed portion of the blade at an angle of incidence with respect to the blade when said knife is drawn across the edge of the sheet or strand, said slotted opening having a width and depth sufficient to permit the edgewise passage of the sheet or strand into said cutting contact with said blade and to prevent said cutting contact with any part of the hand, said planar part having an elongated finger with a tapered end extending proximally-outward therefrom, below said lower edge and parallel to said slotted opening, having a proximal edge coincident with the distal edge of said slotted opening, to hook the sheet or strand into initial engagement within said slotted opening. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. For mounting a single-edge razor blade of the type having a thin, rectangular blade part with a sharpened edge at the bottom, and a thick, rectangular guard part at the top for gripping between the fingers, a safety knife, comprising:
a pair of flat, parallel plates, each said plate being about half the thickness of said guard part, said plates being joined in a side-by-side assembly defining a blade-receiving space therebetween, said blade-receiving space including a thin, lower, rectangular opening between said plates to receive and retain said blade part, and an upper, rectangular opening through both of said plates to receive and retain said guard part, one of said plates containing a relief into said space for a portion of its depth below said rectangular opening to permit insertion and removal of said blade through the side of said assembly and into said space without further disassembly, said plates further containing a slotted opening through said plates to expose a portion of said sharpened edge, said opening being sufficiently narrow and deep to prevent the entry therein of any part of a hand. - View Dependent Claims (9, 10)
Specification