Printer Paper Dispensing Roller Set for Tear Prevention
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Solution Overview
Problem
In automatic processing machines, the continuous paper roll often gets torn or the mechanical structure damaged when users prematurely pull out the paper before the dispensing operation is complete, due to the protrusion of paper from the exit and the mechanical stress it imposes.
Innovation Solution
A printer with a paper dispensing mechanism featuring two rollers made of flexible and elastic material, pressed against each other, ensuring they clamp the paper securely, preventing it from being pulled out prematurely and thus avoiding tears or mechanical damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the paper is delivered to the paper exit during printing, then the user can access the printed information, but the paper front end protrudes out of the paper exit and can be ripped or torn when the user picks it up before dispensing is complete
Solution Approach 1:
The paper dispensing process is segmented into distinct phases: printing phase where paper is fed through the printing mechanism, and dispensing phase where the printed paper is delivered to the exit. The system completes the printing operation fully before initiating paper ejection, ensuring the paper is securely processed before user access.
Solution Approach 2:
The printing operation is completed in advance before the paper dispensing action begins. The system ensures the entire printing process finishes and the paper is properly positioned in the dispensing path before the paper is ejected to the exit, preventing premature user interaction with incompletely processed paper.
2Loss of time
If the user picks up the continuous sheet of paper before completion of the paper dispensing operation, then the user can retrieve the paper, but the paper can be ripped or torn and the mechanical structure can be damaged
Solution Approach 1:
The system implements a control mechanism that prevents paper ejection until the printing operation is fully complete. This preliminary anti-action blocks the dispensing action until the printing process reaches its conclusion, ensuring the paper is fully processed and securely positioned before any ejection occurs, thereby preventing user-induced damage.
Solution Approach 2:
The control system monitors the printing operation status and uses this feedback to control the paper dispensing timing. The system only initiates paper ejection when it receives feedback confirming the printing operation is complete, creating a closed-loop control that prevents premature dispensing and associated damage risks.
3Productivity
If the paper is moved by the rotation of rollers, then the paper can be delivered to the paper exit, but excessively pulling the sheet of paper can cause the internal mechanical structure to be abnormally linked and damaged
Solution Approach 1:
The paper delivery system uses dynamically controlled roller rotation rather than constant motion. The rollers are driven at controlled speeds and only when needed, with the ability to start, stop, and adjust speed based on the printing operation status. This dynamic control prevents excessive mechanical stress on the paper path components.
Solution Approach 2:
The paper delivery mechanism is automatically controlled by the system's own printing operation status. The rollers self-regulate their operation based on whether printing is complete, eliminating the need for external intervention and preventing premature paper ejection that could cause mechanical damage.
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
The solution effectively prevents paper tearing and mechanical damage by securely holding the paper in place until it is fully dispensed, ensuring the user can retrieve the printed information intact and reducing the risk of mechanical stress on the machine.
Implementation Method 1
a paper dispensing roller set drivable by the drive module to carry the sheet of paper of the paper roll toward the paper exit, the paper dispensing roller set comprising two rollers made of a flexible and elastic material and pressed against each other
Data Source
AI summary
A printer includes housing having reel mounted therein to support paper roll and paper exit formed in front panel thereof, printing mechanism positioned in the housing and printing head for printing an ink on the sheet of paper, paper cutter for cutting the sheet of paper and paper path defined between the printing head and the paper cutter for the passing of the leading end of the sheet of paper, and paper dispensing mechanism positioned in the housing, which includes drive module and paper dispensing roller set drivable by the drive module to carry the sheet of paper toward the paper exit. The paper dispensing roller set has two rollers made of a flexible and elastic material and pressed against each other. The distance between the center of the two rollers is less than the combination of the radius of the two rollers.