Browse Prior Art Database

A method to check paper width

IP.com Disclosure Number: IPCOM000013769D
Original Publication Date: 2001-Oct-20
Included in the Prior Art Database: 2003-Jun-18
Document File: 2 page(s) / 58K

Publishing Venue

IBM

Abstract

Disclosed is a method for the measurement of the width of a inserted document using a sensor mounted on a print head.

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A method to check paper width

   Disclosed is a method for the measurement of the width of a inserted document using a sensor mounted on a print head.

Figure 1 shows the flowchart of the disclosure. The printer moves a inserted form to a scanning position to detect the form width. The printer scans the form by using a optical sensor. The sensor is mounted on the print head. If the printer detects the width of the form, the printer turns into the ready-to-print mode. If not, the printer saves the current form position into "FAILED DB" not to use the position next time. The printer decides next scanning position randomly. The scanning position excludes the positions listed on the "FAILED" DB. The printer continues this operation until detecting the width or reaching the maximum retry count. If the retry count reaches the maximum count, the printer ejects the inserted form.

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Insertion of a form

Width detected?

Feed form to scan Position

Scan form

Width

Y

Ready to print

N

Number of

Max count?

Set next feed

Failed

Position?

 Save current feed position into FAILED DB

Y

scanned count >

position for scan randamly

Figure 1. Flow of the form width detection control

Eject document

N

Y

N

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