Thermal Printer Dual-Head Double-Side Printing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing thermal printers are inefficient in rapidly printing data on both surfaces of thermal paper sheets with heat-sensitive layers, leading to longer paper lengths and increased handling difficulties, especially when dealing with large amounts of printing data.
Innovation Solution
A thermal printer design featuring two thermal heads for simultaneous printing on both surfaces, with a control system that divides and synchronizes the printing data between the heads, allowing for rapid printing on both sides of the paper while minimizing paper length and improving handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If processing similar to copying machine is used to print on both surfaces, then double-side printing is achieved, but printing time becomes too long
Solution Approach 1:
The printing system is segmented into two independent thermal heads (first thermal head and second thermal head) that operate simultaneously on different surfaces of the paper sheet. This segmentation allows parallel processing of front and back surfaces, eliminating the sequential processing time of copying machines while maintaining double-side printing capability.
Solution Approach 2:
The patent merges the functions of two thermal heads and two platen rollers into a single integrated printing system. Both thermal heads are mounted on the same cartridge assembly and operate concurrently on the same paper sheet, combining the capabilities of two separate printing operations into one unified process that achieves rapid double-side printing.
2Loss of substance
If thermal paper sheet with heat-sensitive layers on both surfaces is used, then paper length is reduced, but printing speed and efficiency are insufficient
Solution Approach 1:
The paper sheet is functionally segmented into two printable surfaces, each handled by a dedicated thermal head. This allows simultaneous printing on both the front and back surfaces of the same paper sheet, effectively doubling the information capacity per unit of paper while maintaining rapid printing speeds through parallel processing.
Solution Approach 2:
The printing process maintains continuous useful action by having both thermal heads operate simultaneously without interruption. The paper sheet passes through the printing mechanism once, receiving printed content on both surfaces in a single continuous operation, eliminating the need for separate printing passes and maximizing printing efficiency.
3Device complexity
If single thermal head is used, then device complexity is low, but printing capability is limited to one surface
Solution Approach 1:
Two thermal heads are merged into a single cartridge assembly that is installed in one integrated mounting position. This merging approach provides double-side printing capability without proportionally increasing device complexity, as both heads share common support structures, control circuits, and installation procedures.
Solution Approach 2:
The thermal printer achieves multi-functionality by enabling printing on both surfaces of the paper sheet using a single integrated printing mechanism. The system can perform single-side or double-side printing as needed, providing versatile printing capabilities while maintaining relatively simple device architecture through the unified cartridge design.
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 enables rapid double-side printing, reducing paper length and enhancing user convenience, especially in applications like sales receipts, while conserving thermal paper and maintaining cost-effectiveness by not requiring hardware or software changes on the host device.
Implementation Method 1
a thermal head that prints on the thermal paper sheet by contact with the thermal paper sheet in the paper feed direction
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
A thermal paper sheet (1) having heat-sensitive layers on a first surface (1a) and a second surface (1b) having a front-and-rear relationship is prepared. A first thermal head (2) which comes into contact with a front surface (1a) of this thermal paper sheet (1) and a second thermal head (4) which comes into contact with a rear surface (16) of the same are provided. Further, printing data (D0) input from the outside is divided into first printing data (D1) and second printing data (D2). The thermal heads (2, 4) are driven in accordance with the printing data (D1, D2).