Utility knife
First Claim
1. A knife comprising(a) a resilient handle,(b) a blade fixedly connected to said handle, said handle including(1) a pair of complementary shells, each shell presenting an inner face and an outer face,(2) a hinge integral with both of said shells, secured to an inner side of each of said first and second shells and extending longitudinally with said shells,(3) a flap having a first flap member fixedly secured to said inner face of said first shell and a second flap member for receiving said blade,(4) a second hinge connecting said first flap member to said second flap member such that when said knife is in an open position said second flap member can rotate about said second hinge from a first position overlaying said inner face of said first shell to a second position overlaying said first flap member, and(5) means for detachably securing each of said shells to one another thereby forming an enclosure for said second flap member and blade when said knife is in a closed position.
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Accused Products
Abstract
This invention relates to utility knives used to cut various items, including cartons, cardboard, string and wallpaper. Specifically, the invention provides a disposable one-piece razor blade utility knife in which the blade is adjustable yet permanently affixed to the knife handle. When the complementary shells of the handle are open, the blade may be placed in a usable position in which the cutting edge will protrude out of the handle when the shells of the knife are later closed or in a safety position in which the blade will be fully retained in the handle when the knife is closed.
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Citations
53 Claims
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1. A knife comprising
(a) a resilient handle, (b) a blade fixedly connected to said handle, said handle including (1) a pair of complementary shells, each shell presenting an inner face and an outer face, (2) a hinge integral with both of said shells, secured to an inner side of each of said first and second shells and extending longitudinally with said shells, (3) a flap having a first flap member fixedly secured to said inner face of said first shell and a second flap member for receiving said blade, (4) a second hinge connecting said first flap member to said second flap member such that when said knife is in an open position said second flap member can rotate about said second hinge from a first position overlaying said inner face of said first shell to a second position overlaying said first flap member, and (5) means for detachably securing each of said shells to one another thereby forming an enclosure for said second flap member and blade when said knife is in a closed position.
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48. A method of producing a knife, comprising the steps of
(a) molding a knife handle, said knife handle including: -
(1) a pair of elongated complementary shells, each shell presenting an inner face and an outer face; (2) a hinge integral with both of said shells, secured to an inner side of each of said first and second shells and extending longitudinally with said shells; (3) a flap having a first flap member secured to an said first shell by a hinge integral with said first flap member and said outer shell side, and a second flap member for receiving a blade connected to said first flap member by a hinge integral with said first and second members; (4) means for detachably securing said shells to one another; (b) fixedly attaching said blade onto said second flap member of said handle; (c) rotating said first flap member about said hinge with said outer shell side such that said first flap member overlays said inner face of said first shell; and (d) permanently affixing said first flap member to said inner face of said first shell. - View Dependent Claims (49, 50, 51, 52, 53)
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Specification