Impression Paper Clamp for Printer Image Transfer
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Solution Overview
Problem
Existing image transfer mechanisms in printers and copiers face issues with paper misfeed, glue-related problems, and printing quality due to the use of intermediate transfer members, including sliding paper and interference with printed images.
Innovation Solution
The use of an impression paper clamp to hold the impression paper in place instead of glue, with optional apertures for grippers to grip the printing media, and vacuum elements for controlled removal, ensuring stable paper positioning and preventing vacuum interference during image transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If glue is used to hold the impression paper to the impression member, then the impression paper is securely fixed, but the impression paper may slide and the glue band may affect the printed image
Solution Approach 1:
The harmful glue band is extracted and replaced by a mechanical clamp positioning system. The clamp holds the impression paper at the leading edge without leaving any adhesive residue that could interfere with the printed image, thus eliminating the harmful effect while maintaining secure fixation.
Solution Approach 2:
A clamp is introduced as an intermediary mechanism between the impression paper and the impression member. This clamp provides secure fixation through mechanical pressure without using glue, thereby preventing paper sliding while avoiding the harmful effects of adhesive bands on the printed image.
2Reliability
If the clamp is located beyond the leading edge of the printing media, then paper sliding is prevented, but the clamp produces a bump under the printing media affecting print quality
Solution Approach 1:
The clamp is designed to apply pressure locally at the leading edge of the impression paper only, rather than across the entire surface. This localized clamping prevents paper sliding at the critical leading edge position while leaving the rest of the impression paper smooth and free of bumps that would affect print quality.
Solution Approach 2:
The clamp positions the leading edge of the impression paper in the correct location before the printing process begins. By pre-positioning only the leading edge, the system prevents sliding during operation without creating bumps under the printing media, as the clamp is removed or retracted before printing.
3Reliability
If the impression paper is permanently glued to the impression member, then secure fixation is achieved, but paper replacement becomes difficult
Solution Approach 1:
The fixation system transitions from a static permanent glue bond to a dynamic mechanical clamp system. The clamp can be opened and closed to allow easy insertion and removal of impression paper, while still providing secure fixation during operation. This dynamic system combines the benefits of secure holding with easy replaceability.
Solution Approach 2:
The impression paper is designed to be easily discarded and replaced, with the clamp mechanism allowing quick removal without damaging the impression member. The reusable clamp retains the impression member while the impression paper becomes a consumable that can be rapidly exchanged, improving operational efficiency.
4Stability of the object's composition
If the impression paper is made of heavy paper stock, then wrinkling is prevented, but the paper may be more difficult to handle and replace
Solution Approach 1:
The heavy paper stock is used only at the leading edge of the impression paper where it is clamped, providing local stability and preventing wrinkling at the critical clamping position. The rest of the paper can be of lighter weight, maintaining ease of handling and replacement while still preventing wrinkles where it matters most.
Data Source
AI summary
A mechanism for transferring an image from a first surface to printing media comprising:an impression member having an impression surface;printing media grippers associated with said impression surface adapted for holding an edge of the printing media on the impression member during said transfer and then controllably releasing the printing media after transfer;impression media held on the impression surface such that the impression media extends past the edge of the printing media held by the printing media grippers.