Roll Paper Conveyance Path for Curl-Resistant Printing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Printer devices often experience paper jams due to curling of rolled paper, which is exacerbated by decreasing winding diameters, and existing curl removal mechanisms are complex or absent, leading to inefficient printing.
Innovation Solution
A printer device with a damper unit applying elastic force to the paper from the outer surface and a guide unit forming a conveyance path opposite to the curling tendency, combined with a method of alternating conveyance directions to mitigate curling, using a damper unit and a second guide unit to stabilize paper conveyance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional conveyance system is used without curl correction, then the device complexity is low, but paper jams occur due to curling tendency increasing as winding diameter decreases
Solution Approach 1:
The guide unit is designed with a curved surface that matches the curling tendency of the paper. As the paper is conveyed, the curved guide unit applies a counteracting force to correct the paper's curvature, ensuring stable conveyance without increasing device complexity significantly.
Solution Approach 2:
The system dynamically adjusts the conveyance path parameters by using a curved guide unit that adapts to the paper's curling state. The curved surface geometry is specifically designed to counteract the increasing curling tendency as the winding diameter decreases, maintaining consistent paper flatness throughout the conveyance process.
2Quantity of substance
If the winding diameter of rolled paper decreases, then more paper can be accommodated in the same space, but the curvature of curl increases causing leading end to be caught in unevenness and gaps
Solution Approach 1:
The guide unit employs a curved surface specifically designed to counteract the increased curling that occurs when the winding diameter is small. The curvature of the guide unit matches and opposes the paper's natural curl, preventing the leading end from catching in unevenness or gaps in the conveyance path.
Solution Approach 2:
The curved guide unit applies a counteracting force to the paper's curling tendency before the paper reaches problematic areas of the conveyance path. By pre-correcting the paper's curvature as it enters the guide unit, the system prevents the leading end from being caught in unevenness or gaps downstream.
3Reliability
If a curl removing mechanism is added to correct paper curling, then paper conveyance stability improves, but the device complexity and configuration become complicated
Solution Approach 1:
Instead of using a complex active curl removal mechanism, the invention employs a passive curved guide unit that corrects paper curling through its geometry alone. The curved surface naturally guides the paper through a path that counteracts curling, achieving reliable conveyance without motors, sensors, or adjustable components.
Solution Approach 2:
The curved guide unit corrects paper curling passively as the paper passes through it, using the paper's own conveyance motion to apply the correcting force. The system does not require external power or active control - the curved geometry automatically applies the necessary counter-curving force during normal paper feed operation.
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
Reduces curling tendency and tension fluctuations, preventing paper jams and ensuring stable, efficient printing by correcting the curling tendency and maintaining paper stability during conveyance.
Implementation Method 1
a damper unit provided between the accommodation portion and the thermal head, and abutting against the paper from a winding outer surface side of the paper to apply an elastic force to the paper
Data Source
AI summary
According to one embodiment, a printer device according to an embodiment includes: an accommodation portion configured to accommodate paper wound in a roll shape; a conveyance unit configured to pull out the paper from the accommodation portion and convey the paper; a printing unit configured to print on the paper conveyed by the conveyance unit; a damper unit provided between the accommodation portion and the printing unit and configured to abut against the paper from a winding outer surface side of the paper to apply an elastic force to the paper; and a guide unit facing the damper unit and configured to form, between the guide unit and the damper unit, a conveyance path of the paper having a curved surface opposite to the curling tendency of the paper.