Receipt Printer Paper Looping Mechanism for Jam Prevention
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Solution Overview
Problem
Receipt printers often experience issues with paper not dropping correctly from the discharge port, either falling inside or outside the printer due to partial cutting, leading to paper jams and operator discomfort during settlement processing.
Innovation Solution
The receipt printer employs a clamping section with a first and second section to bend the paper into a loop shape before discharge, ensuring the front end is clamped, which prevents paper from falling and allows for high-speed discharge without causing user discomfort, while also enabling easy handling and folding of receipts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the paper is partially cut to prevent it from dropping completely, then the paper remains attached to the rolled paper, but the paper may still fall inside or outside the printer causing jams
Solution Approach 1:
The patent applies curvature by bending the paper into a loop shape before discharge. The paper is fed through a guide that creates a curved path, forming a loop configuration that prevents the paper from falling inside or outside the printer while maintaining reliable attachment to the rolled paper during partial cutting operations
2Productivity
If the paper is discharged at high speed to improve efficiency, then productivity increases, but the paper may not be properly controlled and may cause jams
Solution Approach 1:
The patent applies preliminary action by forming the paper loop shape before the actual discharge process. The guide structure pre-configures the paper in a loop configuration upstream of the discharge point, ensuring proper paper control and orientation is established before high-speed discharge occurs, preventing jams even at high speeds
3Ease of operation
If the paper is completely cut for easy separation, then the receipt can be easily separated from the rolled paper, but the paper drops from the discharge port to the inside or outside of the printer
Solution Approach 1:
The patent combines curvature (loop shape formation) with partial cutting to resolve this contradiction. The paper is partially cut to allow eventual separation while the loop configuration ensures the paper remains controlled and does not drop during discharge, achieving both easy separation and reliable position control
Data Source
AI summary
A receipt printer comprises a discharge port configured to discharge a receipt; a conveyance section configured to convey a paper; a clamping section configured to clamp the paper in the front of the discharge port; and a controller configured to control the conveyance section to discharge the paper from the discharge port. The clamping section includes a fixed section and a movable section forming a paper insertion section, and the paper is clamped by the fixed section and the movable section if the paper is inserted into the paper insertion section. A paper conveyance direction in which the paper is directed to the paper insertion section is different from a paper discharge direction in which the paper is discharged from the discharge port. The controller controls the clamping section such that a front end of the paper is clamped with the clamping section by conveying the paper towards the paper insertion section and the paper is bent into a loop shape by further conveying the paper towards the paper insertion section from a state in which the paper is clamped by the clamping section to be discharged from the discharge port.