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US 5,490,667 AGranted
Sheet transportation apparatus carrying out error determination considering switching of sheet transportation path
AssigneeMinolta Co., Ltd.
InventorsTeruo Nagashima, Satoshi Oba, Tomomi Ishizuka, Hiroyuki Masuda
Life of this patent
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Abstract
A timer starts when a first sensor detecting "close" of a switching cover and a second sensor detecting "open" of the switching cover are both OFF at the start of a read out operation. When one of said first and second sensors is turned on before the timer expires, an error is not displayed and the flow proceeds to a subsequent process. When first and second sensors are still OFF when the timer expires, an error is displayed indicating that the switching cover is in a defective open state.
Claims17
A sheet transportation apparatus comprising:
- a first transportation path,
- a second transportation path located downstream of said first transportation path,
- a guide member provided at the connection of said first and second transportation paths movable between a first position guiding a sheet transported from said first transportation path to said second transportation path and a second position leading to a direction other than said second transportation path,
- a sensor for detecting the position of said guide member,
- a counter responsive to an output of said sensor indicating that said guide member is not located at said first or second position for initiating counting of a predetermined time period, and
- a determination unit for making determination of an error when counting by said counter ends, and when said guide member is not located at said first or second position.
3 more elements
A sheet transportation apparatus comprising:
- a first transportation path,
- a second transportation path located backstream of said first transportation path,
- a switching mechanism including a movable guide member located at the trailing edge of said first transportation path, wherein said guiding member switches to a state in which a sheet transported from said first transportation path is guided to said second transportation path and a state in which the sheet is guided to a direction other than said second transportation path,
- a first sensor provided in said first transportation path for detecting a sheet,
- a second sensor provided in said second transportation path for detecting a sheet,
- a counter responsive to an output of a paper detection by said first sensor for initiating counting of a predetermined time, and
- confirmation means for confirming a set state of said switching mechanism when counting by said counter ends and when said second sensor does not detect a sheet.
4 more elements
A sheet transportation apparatus comprising:
- a transportation path,
- a first sensor for detecting that an original has passed a first position of said transportation path,
- a second sensor for detecting that an original has passed a second position of said transportation path, wherein said second position is located downstream of the transportation direction with respect to said first position,
- a switching mechanism provided between said first and second positions of said transportation path for switching said transportation path so as to transport an original passing said first position to a third position differing from said second position,
- a counter responsive to a detection output of said first sensor for initiating counting of a predetermined time period,
- confirmation means for confirming a set state of said switching mechanism, and
- control means for making determination of an error when counting of a predetermined time period by said counter ends without detection of a passage of a sheet by said second sensor, and when confirmation is made by said confirmation means that the set state of said switching mechanism is in a state of sending a sheet from said first position to said second position.
4 more elements
A sheet transportation apparatus comprising:
- a transportation path,
- a first sensor for detecting that a sheet has passed a first position of said transportation path,
- a second sensor for detecting that a sheet has passed a second position of said transportation path, wherein said second position is located downstream of the transportation direction with respect to said first position,
- a switching mechanism provided between said first and second positions of said transportation path for switching said transportation path to transport a sheet passing through said first position to a third position differing from said second position,
- a counter responsive to a detection by said first sensor for initiating counting of a predetermined time period,
- confirmation means for confirming the set state of said switching mechanism, and
- control means, confirming the set state of said switching mechanism by said confirmation means after initiating counting by said counter for error control according to the set state of said switching mechanism and detection of said second sensor.
4 more elements
Dependencies are inferred from the claim text.