Abstract A copier having an automatic document feeder (ADF) and selectively operable in a one-side copy mode for reproducing a document image on only one side of a paper sheet and a two-sided copy mode for reproducing document images on both sides of a paper sheet. A reversing device reverses a paper sheet undergone a copying procedure. When a tray included in the ADF is loaded with a combined stack of one-sided and two-sided documents, the condition of the back of each document is sensed by a sensor while the document is transported toward an illuminating position. The copier is automatically conditioned for the two-sided copy mode if an image is present on the back of the document or for the one-sided copy mode if otherwise. The paper sheets with images are reversed only in one of the two different copy modes before driven out of the copier.
A copier having an automatic document feeder (ADF) and selectively operable in a one-side copy mode for reproducing a document image on only one side of a paper sheet and a two-sided copy mode for reproducing document images on both sides of a paper sheet, said copier incorporating a reversing device for reversing a paper sheet undergone a copying procedure, said copier comprising: sensing means for determining whether or not a document being transported by said ADF toward an illuminating position carries an image on the back thereof; and control means for automatically conditioning said copier for the two-sided copy mode in response to an output of said sensing means indicative of presence of an image on the back of said document or for the one-sided copy mode in response to an output of said sensing means indicative of absence of an image on the back of said document.
Claim 2
Dependent Claim
149 words
A copier having an automatic document feeder (ADF) and selectively operable in a one-side copy mode for reproducing a document image on only one side of a paper sheet and a two-sided copy mode for reproducing document images on both sides of a paper sheet, said copier incorporating a reversing device for reversing a paper sheet undergone a copying procedure, said copier comprising: sensing means for determining whether or not a document being transported by said ADF toward an illuminating position carries an image on the back thereof; and control means for automatically conditioning said copier for the two-sided copy mode in response to an output of said sensing means indicative of presence of an image on the back of said document or for the one-sided copy mode in response to an output of said sensing means indicative of absence of an image on the back of said document.
Claim 3
Dependent Claim
46 words
A copier as claimed in claim 1, wherein said control means controls said reversing device such that said reversing device reverses, only in one of the two-sided copy mode and one-sided copy mode, a paper sheet undergone a copying procedure before said paper sheet is discharged.
Claim 4
Dependent Claim
14 words
A copier as claimed in claim 1, wherein said control means comprises a microcomputer.