Copying machine having a capability of reproducing images at different magnifications
AssigneeMinolta Camera Kabushiki Kaisha
InventorsMasazumi Ito, Yutaka Irie, Yoshikazu Ikenoue, Minoru Nakamura
Life of this patent
Estimating the term…
Abstract
A copying machine having the capability of reproducing an image at different magnifications from either a stored or calculated magnification ratio is provided. The size of the original and the size of the various copying papers available are calculated to determine an optimum magnification ratio. A preset value of optical magnification ratios can be provided within the copying machine. A controller can determined whether the calculated magnification ratio can be utilized within the preset predetermined range of values and corresponding control of the copier machine can be effected in accordance with that decision.
Claims15
A copying machine with a photoreceptor having a capability of reproducing an image at different magnifications one at a time, which machine comprises, in combination:
- means for detecting the size of an original bearing an image to be reproduced on a copying paper;
- means for discriminating the size of a copying paper to be used;
- a storage means storing a numerical figure representative of a magnification ratio of the original image and composed of a predetermined number of digits;
- a magnification control means for controlling at least the magnification ratio at which the image is projected onto the photoreceptor in dependence on the numerical figure stored in the storage means so as to enable a copying operation to be executed at a magnification corresponding to the numerical figure stored in the storage means;
- a calculating means for calculating a magnification ratio from the size of the copying paper discriminated by said discriminating means;
- and
- a regulating means for causing a value, obtained by the calculation performed by said calculating means, to be stored in said storage means when said value is within a predetermined range of present values.
A copying machine with a photoreceptor having a capability of reproducing an image from an original at different magnifications on copying paper which machine comprises, in combination:
- a first means for detecting the size of an original bearing an image to be reproduced on a copying paper;
- a plurality of paper loading units;
- a second means for detecting the size of copying papers loaded on each of the loading units;
- a selector means for selecting one of the copying papers loaded on the respective loading units;
- first and second storage means for the storing of a numerical figure representative of a predetermined magnification ratio having a predetermined number of digits;
- a numerical input means for inputting the numerical figure to the first storage means through a predetermined manipulation;
- a mode selector means for selecting one of the first and second operating modes in which the machine operates;
- a magnification control means for controlling at least the magnification at which the image is projected onto a photoreceptor in response to the numerical figure stored in the first or second storage means;
- and
- a control means for causing the first storage means to be associated selectively with the magnification control means when the first operating mode is selected by the mode selector means and for, when the second operating mode is selected by the mode selecting means, calculating the magnification from the size of the original detected by the first detecting means and also the size of the copying paper detected by the second means to store a value obtained by the above calculation when the second storage means is selectively associated with the magnification control means.
Dependencies are inferred from the claim text.