Top of Form Detection Using Printed Calibration Scales
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Solution Overview
Problem
Conventional continuous feed media printing systems require expensive media with top of form markers and sensors, or manual alignment, to initiate printing at the correct location, increasing costs and complexity.
Innovation Solution
A system and method that uses standard printers and media with calibration techniques to automatically determine the top of form location by printing calibration scales across form delimiters, determining relevant printer parameters, and applying compensation factors to align the media for accurate printing initiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional continuous feed media printing systems use specialized media with top of form markers and sensors, then printing can be initiated at the correct location, but acquisition and operating costs increase
Solution Approach 1:
The patent uses a printed calibration scale (a copy of the form delimiter location) instead of physical markers or sensors on the media. The calibration scale is printed on the continuous feed media and contains scale values that indicate the position of form delimiters, allowing the system to determine top-of-form location without specialized media features.
Solution Approach 2:
The patent replaces expensive specialized media with standard media that has a simple printed calibration scale. The calibration scale is a simple printed pattern that can be easily reproduced on ordinary continuous feed media, significantly reducing media costs while maintaining functionality.
2Manufacturing precision
If conventional systems use sensors and markers to detect top of form location, then printing alignment is achieved, but device complexity increases
Solution Approach 1:
The patent replaces mechanical/electronic sensor-based detection with an optical printing and measurement system. Instead of using sensors to detect physical markers, the system prints a calibration scale and uses the printed scale values to determine position, substituting mechanical detection with printing and data processing.
Solution Approach 2:
The system creates a printed copy of the form delimiter location information (the calibration scale) that can be read and processed to determine top-of-form position. This printed copy replaces the need for complex sensor-based detection systems.
3Manufacturing precision
If manual alignment methods are used to position media for printing, then printing can start at correct location, but time consumption and labor requirements increase
Solution Approach 1:
The system automatically determines the top-of-form location by reading the calibration scale values printed on the media. The calibration scale self-indicates the position of form delimiters, allowing the system to automatically position and align media without manual intervention.
Solution Approach 2:
The calibration scale is printed on the media in advance during the normal printing process. This preliminary printing of the calibration scale provides the positioning information needed for subsequent automatic alignment, eliminating the need for separate manual alignment steps.
Data Source
AI summary
A system and method for determining top of form while printing on continuous feed media. In one embodiment, a computer-readable storage device is encoded with instructions that when executed cause a processor to: 1) cause a selected printer to produce a print on continuous feed media; 2) determine, based on a compensation factor that accounts for movement of the continuous feed media through the printer in excess of a length of the data of the print, the distance to advance the continuous feed media such that a succeeding print starts at a top of form location of the continuous feed media; and 3) cause the selected printer to advance the continuous feed media in accordance with the determined distance to advance such that the succeeding print starts at the top of form location of the continuous feed media.