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US 7,124,670 B2Granted
Method and apparatus for estimating a life-span of a cutter
AssigneeFuji Photo Film Co., Ltd.
InventorsShigeru Tanaka, Shigeki Morisawa
Life of this patent
Estimating the term…
Abstract
An apparatus for estimating a lifetime of a cutter for cutting a sheet comprising: a detector for detecting a value of a parameter representing a cutting resistance during sheet cutting; a comparator for comparing the detected value of the parameter with a predetermined reference value; and an output element for outputting a result based on the comparison.
Claims9
A method of estimating a lifetime of a sheet cutter for cutting a sheet piece from a sheet by shearing, wherein the sheet cutter comprises a fixed blade;
- a movable blade which is movable along the fixed blade;
- and an apparatus for estimating a lifetime of the movable blade for cutting a sheet;
- and a receiving element that receives a sheet piece that is cut off from the sheet;
- said method comprising the steps of:
- (a) detecting a value of a parameter representing a cutting resistance during sheet cutting, wherein the parameter is a value of a current that is loaded onto a motor for driving the cutter;
- (b) comparing the detected value of the parameter with a predetermined reference value, wherein it is determined that the movable blade is unfit for use when the value of the parameter exceeds the predetermined reference value;
- and
- (c) outputting a result based on the comparison;
- wherein the movable blade comprises a disk which is rotatably supported, and the receiving element comprises a roller which is rotatably supported, and
- wherein the receiving element is vertically coplanar with the movable blade.
7 more elements
A sheet cutter for cutting a sheet piece from a sheet by shearing, the sheet cutter comprising:
- a fixed blade;
- a movable blade which is movable along the fixed blade;
- and
- an apparatus for estimating a lifetime of the movable blade, comprising
- a motor for driving the movable blade;
- a detector for detecting a value of a parameter representing a cutting resistance during sheet cutting, wherein the parameter is a value of a current loaded on the motor;
- a comparator for comparing the detected value of the parameter with a predetermined reference value, wherein the comparator determines that the movable blade is unfit for use when the value of the parameter exceeds the predetermined reference value;
- an output element for outputting a result based on the comparison;
- and
- a receiving element that receives a sheet piece that is cut off from the sheet,
- wherein the movable blade comprises a disk which is rotatably supported, and the receiving element comprises a roller which is rotatably supported, and
- wherein the receiving element is vertically coplanar with the movable blade.
9 more elements
A sheet cutter for cutting a sheet piece from a sheet by shearing, the sheet cutter comprising:
- a fixed blade;
- a movable blade which is movable along the fixed blade;
- and
- an apparatus for estimating a lifetime of the movable blade, comprising
- a motor for driving the movable blade;
- a detector for detecting a value of a parameter representing a cutting resistance during sheet cutting, wherein the parameter is a value of a current loaded on the motor;
- a comparator for comparing the detected value of the parameter with a predetermined reference value, wherein the comparator determines that the movable blade is unfit for use when the value of the parameter exceeds the predetermined reference value;
- and
- an output element for outputting a result based on the comparison;
- a receiving element which receives a sheet piece that is cut off from the sheet, the receiving element being structured so as to be movable together with the movable blade,
- wherein the receiving element has a groove that receives an edge portion of the piece of sheet which is cut off, which edge portion is in a state in which it hangs down after cutting, and wherein the movable blade comprises a disk which is rotatably supported, and the receiving element comprises a roller which is rotatably supported.
8 more elements
A sheet cutter for cutting a sheet piece from a sheet by shearing, the sheet cutter comprising:
- a fixed blade;
- a movable blade which is movable along the fixed blade;
- an apparatus for estimating a lifetime of the movable blade, comprising
- a motor for driving the movable blade;
- a detector for detecting a value of a parameter representing a cutting resistance during sheet cutting, wherein the parameter is a value of a current loaded on the motor;
- a comparator for comparing the detected value of the parameter with a predetermined reference value, wherein the comparator determines that the movable blade is unfit for use when the value of the parameter exceeds the predetermined reference value;
- and
- an output element for outputting a result based on the comparison;
- and
- a receiving element which receives a sheet piece that is cut off from the sheet, the receiving element being structured so as to be movable together with the movable blade,
- wherein the receiving element has a groove that receives an edge portion of the piece of sheet which is cut off, which edge portion is in a state in which it hangs down after cutting.
8 more elements
Dependencies are inferred from the claim text.