Long Sheet Image Forming System Adjustment Chart Extraction
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Solution Overview
Problem
In image forming apparatuses using long sheets, adjustment charts often mix with output results, leading to potential issues in maintaining desired image quality, especially when image formation is interrupted during the process of sheet feeding, image formation, and sheet delivery.
Innovation Solution
The system temporarily stops conveying the long sheet, cuts out the region where the additional image is formed, and controls the sheet delivery to prevent the adjustment chart from being wound up, ensuring it does not mix with the output results by using a sheet feeding apparatus, an image forming apparatus, and a sheet delivering apparatus, along with a control apparatus that manages these processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If image formation of another image (adjustment chart) is executed in the middle of image formation by using long sheets, then image quality correction can be performed, but the adjustment chart mixes into output resultant matters
Solution Approach 1:
The patent extracts the adjustment chart from the continuous long sheet by cutting it out at a specific position. The sheet delivering apparatus is controlled to stop conveying the long sheet, and a cutting apparatus cuts out the adjustment chart at a predetermined position, separating it from the output resultant matters while maintaining image quality correction benefits
Solution Approach 2:
The patent performs preliminary action by controlling the sheet delivering apparatus to stop conveying the long sheet before the adjustment chart reaches the output position. This preliminary stopping prevents the adjustment chart from mixing into output resultant matters before the cutting operation occurs
2Measurement precision
If adjustment chart is formed and transferred onto long sheet, then measurement can be performed, but the adjustment chart cannot be easily removed from ordinary sheets
Solution Approach 1:
The patent enables easy removal of the adjustment chart by cutting it out from the long sheet at a predetermined position. The cutting apparatus separates the adjustment chart region from the rest of the long sheet, making it easy to remove while maintaining the benefit of accurate measurement on the transferred chart
Solution Approach 2:
The patent segments the long sheet into distinct regions: the adjustment chart region and the ordinary output region. By cutting at a predetermined position, the adjustment chart is separated as an independent segment that can be easily removed, while the ordinary sheets remain intact for their intended use
3Productivity
If long sheet is continuously conveyed and wound up, then productivity is maintained, but adjustment chart cannot be prevented from being wound up
Solution Approach 1:
The patent performs preliminary action by controlling the sheet delivering apparatus to stop conveying the long sheet before the adjustment chart reaches the winding-up position. This preliminary stopping prevents the adjustment chart from being wound up while minimizing disruption to continuous operation
Solution Approach 2:
The patent extracts the adjustment chart from the continuous long sheet through cutting at a predetermined position. This extraction allows the adjustment chart to be removed before winding up, preventing it from being included in the wound-up material while maintaining continuous operation productivity
Data Source
AI summary
A control apparatus controls a sheet feeding apparatus, an image forming apparatus and a sheet delivering apparatus so as to perform image formation based on image data while conveying a long sheet at a constant speed, and at the time of executing image formation of another image based on another image data other than the image data in the middle of image formation based on the image data, the control apparatus controls to stop conveying of the long sheet temporarily, and controls to cut out a region where the another image is formed in the state of stopping conveying of the long sheet temporarily.