Impact printer with variable impact and rebound control
AssigneeCanon Kabushiki Kaisha
InventorTetsuya Saito
Life of this patent
Estimating the term…
Abstract
An impact printer has a platen, a carriage movable in parallelism to the platen, a hammer carried on the carriage, driving means for protruding the hammer toward the platen, detecting means for detecting the speed of the hammer striking against the platen and returned therefrom, and control means for changing over the speed at which the hammer is protruded toward the platen in conformity with the result of the detection of the detecting means.
Claims21
A recording apparatus for recording on a recording medium, said apparatus comprising:
- an image holding member;
- impacting means for impacting said image holding member to record on the recording medium, said impacting means being movable between an impacting position and a standby position;
- driving means for driving said impacting means from said standby position to said impacting position, said driving means applying first and second drive forces for driving said impacting means to said impacting position and a third drive force applied between said first and second drive forces;
- discriminating means for discriminating whether said third drive force is applied to said impacting means as said impacting means returns from said impacting position to said standby position;
- and
- controlling means for controlling said drive means, wherein
- when said discriminating means discriminates that said third drive force is not applied to said impacting means, said control means controls said drive means to apply a second drive which is smaller than said first drive force.
A recording apparatus for recording on a recording medium, said apparatus comprising:
- a platen;
- a character wheel having a plurality of character members;
- hammer means for striking a selected one of said character members against said platen through the recording medium and an ink ribbon, said hammer means being moveable between an impacting position and a standby position;
- drive means for driving said hammer means from said standby position to said impacting position, said drive means applying first and second drive forces for driving said hammer means to said impacting position and a third drive force applied between said first and second drive forces;
- discriminating means for discriminating whether said third drive force is applied to said hammer means as said hammer means returns from said impacting position to said standby position;
- and
- controlling means for controlling said drive means, wherein
- when said discriminating means discriminates that said third drive force is not applied to said hammer means, said control means controls said drive means to apply a second drive force which is smaller than said first drive force.
An image printer for recording on a recording medium to be recorded, said printer comprising:
- an image holding member;
- impacting means for impacting said image holding member to record on the recording medium, said impacting means being movable between an impacting position and a standby position;
- driving means for driving said impacting means from said standby position to said impacting position, said driving means applying first and second drive forces for driving said impacting means to said impacting position and a third drive force applied between said first and second drive forces;
- discriminating means for discriminating whether said third drive force is applied to said impacting means as said impacting means returns from said impacting position to said standby position;
- and
- controlling means for controlling said drive means, wherein
- when said discriminating means discriminating that said third drive force is not applied to said impacting means, said control means controls said drive means to apply a second drive force which is smaller than said first drive force.
Dependencies are inferred from the claim text.