Data sheet and information management system using data sheet

A data sheet readable by a reading device, comprising:

• a first area displaying entire data obtained by encoding all information included in a document;
• a second area storing an image of at least part of the document for a user to preview the document;
• a supporting layer as a basis of said data sheet;
• and
• a reversible recording layer provided on said supporting layer.

A data sheet readable by a reading device, comprising:

• a first area displaying entire data obtained by encoding all information included in a document;
• a second area storing an image of at least part of the document for a user to preview the document;
• and
• a characteristic-information storing area storing information about information-printing/information-erasing characteristics of said data sheet.

A data sheet readable by a reading device, comprising:

• a first area displaying entire data obtained by encoding all information included in a document;
• a second area storing an image of at least part of the document for a user to preview the document;
• and
• an information storing area, in which manufacturer identification and a lot number of said data sheet are recorded.

An information-printing device printing an electronic document, based on a data sheet that includes a first area recording encoded information obtained by encoding an entire document and a second area displaying a reduced image of at least a part of the document for a user to preview the document, the image being visibly fixed and printed on the data sheet, said information-printing device comprising:

• a data reading unit reading said encoded information from said data sheet;
• a decoding unit decoding said encoded information to obtain decoded information;
• and
• a printing unit printing information corresponding to at least the part of said document included in said reduced image among said decoded information.

An information-printing device printing an electronic document, based on a data sheet that includes a first area displaying encoded information obtained by encoding an entire document and a second area storing a reduced image of at least a part of the document for a user to preview the document, said information-printing device comprising:

• a data reading unit reading said encoded information from said data sheet;
• a decoding unit decoding said encoded information to obtain decoded information;
• a printing unit printing information corresponding to at least the part of said document included in said reduced image among said decoded information;
• and
• a processing unit obtaining an application program corresponding to a file format of said decoded information.

An information-printing device printing an electronic document, based on a data sheet that includes a first area displaying encoded information obtained by encoding an entire document and a second area storing a reduced image of at least a part of the document for a user to preview the document, said information-printing device comprising:

• a data reading unit reading said encoded information from said data sheet;
• a decoding unit decoding said encoded information to obtain decoded information;
• a printing unit printing information corresponding to at least the part of said document included in said reduced image among said decoded information;
• and
• a document-processing unit, wherein said data sheet includes a third area storing a check box used for requesting for a process to said document, and said document-processing unit carries out the process to said document in accordance with existence of a mark written in said check box.

An information-printing device printing an electronic document, based on a data sheet that includes a first area displaying encoded information obtained by encoding an entire document and a second area storing a reduced image of at least a part of the document for a user to preview the document, said information-printing device comprising:

• a data reading unit reading said encoded information from said data sheet;
• a decoding unit decoding said encoded information to obtain decoded information;
• a printing unit printing information corresponding to at least the part of said document included in said reduced image among said decoded information;
• and
• a document-processing unit, wherein said data sheet includes a third area storing a control code instructing said information-printing device to perform a process to said document, said decoding unit decodes said control code, and said document-processing unit performs the process to said document by following said control code decoded by said decoding unit.

An information-printing device printing an electronic document, based on a data sheet that includes a first area displaying encoded information obtained by encoding an entire document and a second area storing a reduced image of at least a part of the document for a user to preview the document, said information-printing device comprising:

• a data reading unit reading said encoded information from said data sheet;
• a decoding unit decoding said encoded information to obtain decoded information;
• a printing unit printing information corresponding to at least the part of said document included in said reduced image among said decoded information;
• a password-inputting unit accepting a second password inputted by the user;
• and
• a document-processing unit collating said first password and said second password, and performing a process to said decoded information if said first password matches said second password, wherein said data sheet includes a third area storing an encoded first password, and said decoding unit decodes said encoded first password.

An information-printing device printing an electronic document, based on a data sheet that includes a first area displaying encoded information obtained by encoding an entire document and a second area storing a reduced image of at least a part of the document for a user to preview the document, said information-printing device comprising:

• a data reading unit reading said encoded information from said data sheet;
• a decoding unit decoding said encoded information to obtain decoded information;
• and
• a printing unit printing information corresponding to at least the part of said document included in said reduced image among said decoded information, wherein said printing unit prints the information corresponding to at least the part of said document, by following a file format of said decoded information.

An information-management system managing document information by use of a data sheet including a first area and a second area, comprising:

• a data-recording unit recording an entire document in the first area by encoding the entire document to a code readable by a computer, and displaying a reduced image of at least a part of the document in the second area for a user to preview the document, the image being visibly printed and fixed on the data sheet;
• a data reading unit reading said code from said data sheet;
• a decoding unit decoding said code to obtain decoded document;
• and
• a printing unit printing at least the part of the document included in the reduced image among said decoded document.