Printer having precision sheet transport control method and apparatus
US6290351A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 1, 1999 |
| Grant date | Sep 18, 2001 |
| Priority date | — |
| Expiry date | Nov 1, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J11/007
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A printer and a method for producing precise registered images are provided. The method in the printer is carried out by an included sheet transport and control assembly for moving a sheet of paper along a sheet path through a printing zone. The sheet transport and control assembly includes drive device; a moveable sheet carrying web member having a first edge and a second edge having an array of precision holes, including adjacent holes spaced a precise distance apart, formed through at least the first edge and the second edge. The sheet transport and control assembly also includes a programmable controller connected to the drive device, and a dual sensor assembly mounted along the sheet path and connected to the programmable controller for responsively generating and inputting precision hole position signals to the programmable controller. The dual sensor assembly includes a first sensor for generating a first increasing and decreasing signal, and a second sensor for generating a second increasing and decreasing signal that increases and decreases oppositely relative to the first signal. The programmable controller controls the moving device to move and stop the web member respon…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.