Movable Blade Receiving Area Paper Jam Prevention
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Solution Overview
Problem
Existing printing apparatuses face issues with partially cut continuous paper entering the movable-blade receiving area, leading to bending, uncut portion breakage, and paper jams during backward or forward feeding, especially with curved paper rolls or environmental deformations.
Innovation Solution
A movable paper-conveyance guiding member is introduced in the movable-blade receiving area, projecting beyond the cutting edge when cutting is not performed, to block the path and prevent paper jams by guiding the paper during backward feeding and ensuring smooth forward feeding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a movable blade is provided in the movable-blade receiving area to perform cutting, then the cutting function is achieved, but the downstream connected recording paper may enter the movable-blade receiving area during backward feeding, causing bending, uncut portion breakage, and paper jams
Solution Approach 1:
A paper conveyance guiding member is introduced as an intermediary component between the downstream connected recording paper and the movable-blade receiving area. This guiding member has a paper conveyance guiding surface that directs the paper away from the movable-blade receiving area during backward feeding, preventing the paper from entering the cutting area and avoiding bending, breakage, and jams
Solution Approach 2:
The paper conveyance guiding member is positioned to preliminarily guide the downstream connected recording paper before it can enter the movable-blade receiving area. By providing the paper conveyance guiding surface in advance, the system prevents harmful entry into the cutting area before it can cause damage during backward or forward feeding operations
2Reliability
If the movable blade slides along the fixed blade to cut the recording paper, then the full cutting function is achieved, but the uncut portion may break when the downstream connected recording paper enters the movable-blade receiving area
Solution Approach 1:
The paper conveyance guiding member acts as a protective intermediary that redirects the downstream connected recording paper away from the movable-blade receiving area. This prevents the uncut portion from being subjected to mechanical stress from the sliding blade, eliminating the risk of breakage while maintaining the integrity of the uncut portion
3Productivity
If the downstream connected recording paper is left in place after partial cutting, then the continuous paper can be printed, but the paper may be fed backward into the movable-blade receiving area, causing bending and jams
Solution Approach 1:
The paper conveyance guiding member serves as a protective intermediary that maintains paper shape stability during continuous printing operations. By providing the paper conveyance guiding surface, it ensures that the downstream connected recording paper is directed away from the movable-blade receiving area during backward feeding, preventing bending and jams while allowing continuous printing to proceed
Data Source
AI summary
A movable BF guide is provided in a movable-blade receiving area into which a movable blade slides along a fixed blade while being pressed against the fixed blade in a process of cutting recording paper. The movable-blade receiving area is blocked by the BF guide when the cutting process is not performed, thus preventing the entry of the end portion of the downstream connected recording paper into the movable-blade receiving area.