Rotatable Print Medium Guide for Jammed Paper Removal
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Solution Overview
Problem
Print media often becomes jammed inside imaging devices, making it difficult for users to access and remove, which hinders the device's functionality and subsequent operations.
Innovation Solution
A paper guide assembly with a rotatable lower guide and an upper guide that buffers the jam area, along with a support mechanism and bias element, allows the paper path to open, enabling easy retrieval of jammed paper by creating a space between the guides when the support mechanism is removed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the paper path is enclosed in the imaging device, then the device structure is compact and stable, but jammed paper becomes difficult to access and remove
Solution Approach 1:
The patent applies the dynamics principle by making the lower guide rotatable rather than fixed. The lower guide can rotate between a first position (parallel to the fixed guide) to define a closed paper path, and a second position (perpendicular to the fixed guide) to open the paper path and create access space. This dynamic transformation allows the structure to adapt between operational and maintenance states, resolving the contradiction between enclosed structure and ease of paper removal.
Solution Approach 2:
The patent applies the dimensionality change principle by rotating the lower guide from a horizontal orientation (first position) to a vertical orientation (second position). This rotation creates a three-dimensional opening in the paper path structure, transforming the enclosed two-dimensional paper path into an open three-dimensional space that allows user access to jammed paper while maintaining structural integrity when closed.
2Ease of operation
If a rotatable guide is added to open the paper path, then paper access is improved, but the device structure becomes more complex
Solution Approach 1:
The patent applies the self-service principle by using a bias element (spring) that automatically rotates the lower guide from the first position to the second position when the support mechanism is removed. The bias element stores potential energy and releases it to perform the opening action, eliminating the need for motors, actuators, or complex control systems. This passive mechanical self-service mechanism reduces overall system complexity while achieving the desired paper path opening functionality.
Solution Approach 2:
The patent applies the extraction principle by removing the support mechanism that normally holds the lower guide in the closed first position. When the support mechanism is extracted (removed), the bias element is free to act on the lower guide, rotating it to the open second position. This extraction of the constraining element enables the automatic opening action without adding complex control systems.
3Ease of operation
If the lower guide is fixed, then the structure is simple and stable, but jammed paper cannot be easily released
Solution Approach 1:
The patent transforms the static fixed guide into a dynamic rotatable guide that can change its orientation based on operational needs. The lower guide rotates between parallel and perpendicular orientations relative to the fixed guide, creating a dynamic paper path that can open to release jammed paper. This dynamic capability directly addresses the inability of fixed guides to release jammed paper while maintaining structural simplicity through passive mechanical means.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Facilitates the removal of jammed print media without requiring users to manually pry it out, ensuring the imaging device can function properly and efficiently process subsequent jobs.
Implementation Method 1
a bias element positioned between the interface mechanism and the second guide to release energy upon exposing the interface mechanism to the pre-print zone area allowing rotation of the second guide away from the first guide
Implementation Method 2
The second guide may be rotatable due to gravitational effects upon the second guide
Data Source
AI summary
An example assembly includes a first guide positioned in a pre-print zone area of an imaging device. A second guide rotatably is connected to the imaging device and spaced apart from the first guide to permit a print medium to traverse between the first guide and the second guide. A bearing mechanism connects the second guide to the imaging device in the pre-print zone area. An interface mechanism is operatively connected to the second guide. A bias element is positioned between the interface mechanism and the second guide to release energy upon exposing the interface mechanism to the pre-print zone area allowing rotation of the second guide away from the first guide.