Image forming apparatus
AssigneeCanon Kabushiki Kaisha
InventorKatsuya Nakama
Life of this patent
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Abstract
An image forming apparatus includes a control portion that performs a double-side image forming mode after performing a single-side image forming mode on a predetermined number of sheets in a state in which a heating unit is not attached to a sheet storage portion. The control portion sets an arrival timing of a first sheet to a transfer portion in the double-side image forming mode to be later than an arrival timing of a first sheet to the transfer portion in the double-side image forming mode in a case the control portion performs the double-side image forming mode after performing the single-side image forming mode on the predetermined number of sheets in a state in which the heating unit is attached to the sheet storage portion.
Claims11
An image forming apparatus comprising:
- an image forming portion configured to form an image on a sheet, the image forming portion including an image bearing member configured to bear a toner image, a transfer portion configured to transfer the toner image from the image bearing member onto a sheet, and a fixing portion configured to fix the toner image to the sheet by heating the sheet to which the toner image has been transferred;
- a reserve-and-conveyance portion configured to reverse the sheet having passed through the fixing portion and convey the sheet to the transfer portion again;
- a first storage portion which is configured to store a sheet to be conveyed to the image forming portion, and to which a first heating unit configured to heat the sheet of the first storage portion is detachably attached;
- an input portion configured for an operator to input information on attachment of the first heating unit to the first storage portion;
- a conveyance unit configured to convey the sheet from the storage portion to the image forming portion;
- and
- a control portion configured to control the conveyance unit in accordance with the information inputted into the input portion and perform, by controlling the image forming portion and the reserve-and-conveyance portion, a single-side image forming mode in which a toner image is formed on only a single side and a double-side image forming mode in which toner images are formed on both sides of a sheet,
- wherein in a case that the control portion performs the double-side image forming mode after performing the single-side image forming mode on a predetermined number of sheets in a state in which the first heating unit is not attached to the first storage portion, the control portion sets an arrival timing of a first sheet to the transfer portion in the double-side image forming mode to be later than an arrival timing of a first sheet to the transfer portion in the double-side image forming mode in a case that the control portion performs the double-side image forming mode after performing the single-side image forming mode on the predetermined number of sheets in a state in which the first heating unit is attached to the first storage portion.
Dependencies are inferred from the claim text.