Two-sided reading-out apparatus and an image forming apparatus

A two-sided reading-out apparatus comprising:

• original document piling means for piling thereon plural sheets of an original document so as to put upside a first surface of said original document, above a contact glass;
• fixed reading-out means disposed on a position at a more downstream side in an original document conveying direction than that of said contact glass, above said contact glass and below said original document piling means, for reading out a second surface of said original document at a time of conveying the original document;
• movable reading-out means for reading out said first surface of said original document conveyed from said original document piling means onto a predetermined position of said contact glass and stopped thereon at a time of moving said original document on said contact glass;
• paper conveying means for conveying said original document along a paper conveying path extending from said original document piling means to a position downstream of said fixed reading-out means along said contact glass;
• and
• paper conveyance controlling means for changing a preliminary conveying position for a second original document and waiting temporarily with a one-side surface mode of reading out only one side surface of said original document and with a two side surfaces mode of reading out both surfaces of said original document, before ending a reading-out of the original document.

A two-sided reading-out apparatus comprising:

• original document piling means for piling thereon plural sheets of a original document so as to put upside a second surface of said original document, above a contact glass;
• fixed reading-out means disposed on a position at a more upstream side in an original document conveying direction than that of said contact glass, above said contact glass and below said original document piling means, for reading out a first surface of said original document at a time of conveying the original document;
• movable reading-out means for reading out said second surface of said original document conveyed from said original document piling means onto a predetermined position of said contact glass and stopped thereon at a time of moving said original document on said contact glass;
• paper conveying means for conveying said original document along a paper conveying path formed from said original document piling means onto the contact glass through said fixed reading-out means;
• and
• paper conveyance controlling means for changing a preliminary conveying position for conveying a second document and waiting temporarily with a one-side surface mode of reading out only one side surface of said original document and with a two-side surfaces mode of reading out both surfaces of said original document, before ending reading-out of the original document.

A two-sided reading-out apparatus comprising:

• an original document piling unit piling thereon plural sheets of an original document so as to put upside a first surface of said original document, above a contact glass;
• a moving and reading-out unit moving and reading out said first surface of said original document conveyed onto a predetermined position on said contact glass from said original document piling unit and stopping thereon said conveyed original document on said contact glass;
• a fixed reading-out unit conveying the original document and reading out a second surface of said original document, below said original document piling unit and above said contact glass;
• a paper discharging unit discharging said original document conveyed through said fixed reading-out unit, below said original document piling unit and above said contact glass;
• a paper conveying unit conveying said original document along a first conveying path from said original document piling unit to said contact glass and directing said conveyed original document from said contact glass to said paper discharging unit via said fixed reading-out unit and for further conveying said original document along a second conveying path formed on an inner side of said first conveying path;
• a changing-over unit changing over a conveying direction of said original document to said first conveying path or to said second conveying path;
• and
• a paper conveyance controlling unit conveying said original document piled on said original document piling unit onto said contact glass along said first conveying path by use of said paper conveying unit and thereafter changing over the conveying direction to said second conveying path and thereby inversely driving said paper conveying unit, and for conveying said original document from said contact glass to said paper discharging unit via said fixed reading-out unit.

A two-sided reading-out apparatus comprising:

• an original document piling unit piling thereon plural sheets of an original document so as to put upside a first surface of said original document, above a contact glass;
• a fixed reading-out unit disposed on a position at a more downstream side in an original document conveying direction than that of said contact glass, above said contact glass and below said original document piling unit reading out a second surface of said original document at a time of conveying the original document;
• a movable reading-out unit reading out said first surface of said original document conveyed from said original document piling unit onto a predetermined position of said contact glass and stopped thereon at a time of moving said original document on said contact glass;
• a paper conveying unit conveying said original document along a paper conveying path extending from said original document piling unit to a position downstream of said fixed reading-out unit across said contact glass;
• and
• a paper conveyance controlling unit changing a preliminary conveying position for a second document and waiting temporarily with a one-side surface mode of reading out only one side surface of said original document and with a two-side surfaces mode of reading out both surfaces of said original document, before ending reading-out of the original document.

A two-sided reading-out apparatus comprising:

• an original document piling unit piling thereon plural sheets of an original document so as to put upside a second surface of said original document, above a contact glass;
• a fixed reading-out unit disposed on a position at a more upstream side in an original document conveying direction than that of said contact glass, above said contact glass and below said original document piling unit, reading out a first surface of said original document at a time of conveying the original document;
• a movable reading-out unit reading out said second surface of said original document conveyed from said original document piling unit onto a predetermined position of said contact glass and stopped thereon at a time of moving said original document on said contact glass;
• a paper conveying unit conveying said original document along a paper conveying path formed from said original document piling unit onto the contact glass through said fixed reading-out unit;
• and
• a paper conveyance controlling unit changing a preliminary conveying position for conveying a second document and waiting temporarily with a one-side surface mode of reading out only one side surface of said original document and with a two-side surfaces mode of reading out both surfaces of said original document before ending reading-out of the original document.

A method of reading out both surfaces of an original document, comprising the steps of:

• piling, on an original document piling unit, plural sheets of said original document so as to put upside a first surface of said original document, above a contact glass;
• moving and reading out said first surface of said original document onto a predetermined position on said contact glass from said original document piling unit;
• stopping thereon said original document on said contact glass;
• conveying the original document and reading the original document by use of a fixed reading-out unit;
• reading out a second surface of said original document, below said original document piling unit and above said contact glass;
• discharging said original document conveyed through said fixed reading-out unit, below said original document piling unit and above said contact glass;
• conveying said original document along a first conveying path from said original piling unit to said contact glass;
• directing said original document from said contact glass to a paper discharging unit via said fixed reading-out unit;
• further conveying said original document along a second conveying path formed on an inner side of said first conveying path;
• changing over a conveying direction of said original document to said first conveying path or to said second conveying path;
• and
• preparing a paper conveyance controlling unit for performing three steps:
• conveying said original document piled on said original document piling unit onto said contact glass along said first conveying path by use of a paper conveying unit;
• thereafter changing over the conveying direction to said second conveying path and thereby inversely driving said paper conveying unit;
• and
• conveying said original document from said contact glass to said paper discharging unit via said fixed reading-out unit.

A method of reading out both surfaces of an original document, comprising the steps of:

• piling, on an original document piling unit, plural sheets of an original document so as to put upside a first surface of said original document, above a contact glass;
• reading out a second surface of said original document at a time of conveying the original document by use of a fixed reading-out unit disposed on a position at a more downstream side in an original document conveying direction than that of said contact glass, above said contact glass and below said original document piling unit;
• reading out said first surface of said original document conveyed from said original document piling unit onto a predetermined position of said contact glass and stopped thereon at the time of moving said original document on said contact glass by use of a movable reading-out unit;
• conveying said original document along a paper conveying path extending from said original document piling unit to a downstream side of said fixed reading-out unit across said contact glass by use of a paper conveying unit;
• and
• preparing a paper conveyance controlling unit for performing three steps:
• changing a preliminary conveying position;
• conveying a second document;
• and
• waiting temporarily with a one-side surface mode of reading out only one side surface of said original document and with a two-side surfaces mode of reading out both surfaces of said original document, before ending reading-out of the original document.

A method of reading out both surfaces of an original document, comprising the steps of:

• piling, on an original document piling unit, plural sheets of an original document so as to put upside a second surface of said original document, above a contact glass;
• reading out a first surface of said original document at a time of conveying the original document by use of a fixed reading-out unit disposed on a position at a more upstream side in an original document conveying direction than that of said contact glass, above said contact glass and below said original document piling unit;
• reading out said second surface of said original document conveyed from said original document piling unit onto a predetermined position of said contact glass and stopped thereon at a time of moving said original document on said contact glass by use of a movable reading out unit;
• conveying said original document along a paper conveying path formed from said original document piling unit across the contact glass through the fixed reading-out unit;
• and
• changing a preliminary conveying position for conveying a second document and waiting temporarily with a one-side surface mode of reading out only one side surface of said original document and with a two-side surfaces mode of reading out both surfaces of said original document, before ending reading-out of the original document.