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US 7,739,936 B2Granted
Paper punch
AssigneeLee Tack Plastic & Metal Manufacturing Ltd
InventorKwok Ki Stephen Chan
Life of this patent
Estimating the term…
Abstract
A paper punch 100, 200 is disclosed as including a button 110, a die 104, and a die holder 106, 210 with an upper jaw 114, 208 and a lower jaw 116 which are spaced apart from each other, in which the button 110 is operable to move the die 104 relative to the die holder 106, 210 to punch at least a piece of paper out from a sheet of paper 117 received within the paper punch 117, and the die holder 106, 210 includes a wheel 120, 202 for limiting the extent of relative movement between the upper jaw 114, 208 and the lower jaw 116.
Claims2
A paper punch comprising:
- an operating member;
- a die;
- and
- a die holder with an upper jaw member and a lower jaw member which are spaced apart from each other by a slot;
- wherein said operating member is operable to move said die relative to said die holder to punch at least a piece of paper out from a sheet of paper received within said slot of said paper punch;
- wherein said upper jaw member of said die holder includes an unpowered restrictor adapted to limit the extent of relative movement between said upper and lower jaw members;
- wherein insertion of said piece of paper into said slot causes said restrictor to move relative to said upper jaw member along a path substantially parallel to a path of movement of said die relative to said die holder;
- wherein said lower jaw member has a flat surface facing said upper jaw member;
- and,
- wherein, when in an absence of said sheet of paper within said slot, said restrictor contacts said flat surface of said lower jaw member
- wherein said restrictor is a wheel member that has a hole with a diameter larger than that of a pin about which said wheel member is rotatable, the maximum extent of relative movement between said upper and lower jaw members is determined by the difference between said diameter of said hole of said wheel member and said diameter of said pin.
8 more elements
A paper punch comprising:
- an operating member;
- a die;
- and
- a die holder with an upper jaw member and a lower jaw member which are spaced apart from each other;
- wherein said operating member is operable to move said die relative to said die holder to punch at least a piece of paper out from a sheet of paper received within said paper punch;
- wherein said upper jaw member of said die holder includes an unpowered restrictor adapted to limit the extent of relative movement between said upper and lower jaw members;
- wherein said lower jaw member has a flat surface facing said upper jaw member;
- and,
- wherein, when in an absence of said sheet of paper within said slot, said restrictor contacts said flat surface of said lower jaw member
- wherein said restrictor is a wheel member that has a hole with a diameter larger than that of a pin about which said wheel member is rotatable, the maximum extent of relative movement between said upper and lower jaw members is determined by the difference between said diameter of said hole of said wheel member and said diameter of said pin.
7 more elements
Dependencies are inferred from the claim text.