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US 5,689,759 AGranted
Copying apparatus and sheet size detecting device adapted for use therein
AssigneeCanon Kabushiki Kaisha
InventorsKeizo Isemura, Hideki Adachi, Tokuharu Kaneko, Satoru Kutsuwada
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Abstract
A copying apparatus provided with a manual sheet feeding device, including an image formation control unit for controlling an image forming operation, a manual input device for designating the size of a copying sheet placed on the manual sheet feeding device, a memory for memorizing the sheet size designated by the manual input device, and a display for displaying the sheet size memorized by the memory. The image formation control unit controls the image forming operation in accordance with the size designated by the manual input device.
Claims24
A sheet size detecting device comprising:
- sheet width setting means for setting width of a recording sheet;
- sheet width detecting means for releasing a first electrical signal corresponding to a set value of said sheet width setting means;
- sheet length setting means for setting the length of said recording sheet;
- sheet length detecting means for releasing a second electrical signal corresponding to a set value of said sheet length setting means;
- sheet size detecting means for detecting the size of said sheet, based on said first and second electrical signals;
- wherein said first electrical signal released by said sheet width detecting means is a continuous electrical signal designating said sheet width, and said second electrical signal released by said sheet length detecting means is an electrical signal designating regular-sized sheets contained in one of plural divided sheet length regions;
- and
- setting means for setting, in case said sheet size detecting means detects plural regular sheet sizes based on said first and second electrical signals, an order of priority of detection to said regular sheet sizes.
5 more elements
A sheet size detecting device comprising:
- sheet width setting means for setting width of a recording sheet;
- sheet width detecting means for releasing a first electrical signal corresponding to a set value of said sheet width setting means;
- sheet length setting means for setting the length of said recording sheet;
- sheet length detecting means for releasing a second electrical signal corresponding to a set value of said sheet length setting means;
- sheet size detecting means for detecting the size of said sheet, based on said first and second electrical signals:
- wherein said first electrical signal released by said sheet width detecting means is a continuous electrical signal designating said sheet width, and said second electrical signal released by said sheet length detecting means is an electrical signal designating regular-sized sheets contained in one of plural divided sheet length regions;
- and
- wherein said sheet size detecting means is so constructed, upon selecting plural regular sheet sizes based on said first and second electrical signals, as to effect sheet size detection according to an order of priority set in advance to said plural regular sheet sizes.
5 more elements
A copying apparatus comprising:
- plural container means containing recording media of predetermined sizes to be fed;
- manual sheet feeding means for feeding manually fed recording media;
- mode setting means for selecting and setting any of the automatic sheet selection mode, the multiple copying mode and the two-side copying mode;
- width detecting means for detecting the width of the recording medium fed from said manual sheet feeding means;
- sheet detection means for detecting the presence or absence of said recording medium fed from said manual sheet feeding means;
- manually fed sheet size display means for displaying, on a display unit, manually feedable candidate sheet sizes, based on the width information detected by said width detecting means;
- and
- selection means for selecting one of the candidate sheet sizes displayed by said manually fed sheet size display means on said display unit;
- wherein, at the setting of any of said mode by said mode setting means, the sheet size selected by said selection means is designated as the manually fed sheet size.
6 more elements
A copying apparatus provided with manual sheet feeding means, comprising:
- image formation control means for controlling an image forming operation;
- manual input means for designating a size of copying sheet placed on said manual sheet feeding means;
- setting means for setting the sheet size designated by said manual input means;
- sheet detecting means for detecting whether the sheet is placed on the manual sheet feeding means;
- and
- resetting means for resetting the sheet size set by said setting means in accordance with said sheet detecting means,
- wherein said image formation control means controls the image forming operation in accordance with the size set by said setting input means.
4 more elements
An image forming apparatus comprising:
- detecting means for detecting a size in at least one direction of a sheet;
- specifying means for specifying at least one regular sheet size based on the size detected by said detecting means;
- designation means for designating, when said specifying means specifies a plurality of the regular sheet sizes, one of the specified plurality of the regular sheet sizes;
- and
- display means for displaying the specified plurality of the regular sheet sizes, when said specifying means specifies a plurality of the regular sheet sizes,
- wherein said designation means designates one of the displayed plurality of the regular sheet sizes based on a manual operation by an operator.
3 more elements
Dependencies are inferred from the claim text.