Lower Paper Guide Design for Printer Cutter Jamming
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Solution Overview
Problem
Printers that cut rolled heat-sensitive recording paper often experience jamming due to the paper's resiliency or curling properties, causing the paper to enter the space between the fixed and movable blades and the discharge port, leading to operational issues and maintenance requirements.
Innovation Solution
The cutter apparatus incorporates a lower paper guide with an inner and outer guide part and a support part, formed from a metal plate, which narrows the space between the blades and the guide, preventing paper jamming by ensuring smooth discharge even with papers of low resiliency or strong curling properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the space between the mounting area of the fixed blade and movable blade and the discharge port is maintained for mounting room, then the blades can be properly installed, but the recording paper may enter this space causing jamming
Solution Approach 1:
A lower paper guide is introduced as an intermediary component between the discharge port and the fixed/movable blades. This guide includes an inner guide part that extends toward the blades and an outer guide part that extends away from the blades, creating a controlled path that prevents paper from entering the dangerous space while maintaining proper blade mounting room
Solution Approach 2:
The lower paper guide extends in multiple directions (inner guide part toward blades, outer guide part away from blades) to create a three-dimensional guiding structure that effectively controls paper movement in the discharge area without increasing device complexity
2Reliability
If the recording paper is rolled and has resilient property or significant curling property, then the paper can be stored compactly, but jamming is more likely to occur during discharge
Solution Approach 1:
The lower paper guide acts as a mediator that provides a controlled discharge path for resilient or curling paper. The guide structure ensures that even when paper tries to curl or rebound, it remains constrained within the guided path and does not enter the space between the discharge port and blades
Solution Approach 2:
The lower paper guide changes the physical parameters of the discharge path by creating a constrained geometry that limits paper movement freedom. This structural parameter change ensures that resilient or curling paper follows a predetermined path rather than moving erratically
Data Source
AI summary
A cutter apparatus includes a fixed blade, a movable blade that moves toward the fixed blade to cut a recording paper, a housing to which the fixed blade is attached, and a discharge port that discharges the recording paper. The discharge port includes a lower paper guide attached to the housing for guiding a lower side of the recording paper. The lower paper guide includes an inner guide part formed on an inner side of the housing toward a side of the fixed blade and the movable blade, an outer guide part formed on an outer side of the housing, and a support part attached to the housing.