Movable Media Guide Buffering for Print Substrate Stability
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Solution Overview
Problem
In printing systems, vibrations and jams occur when transferring substrates from printers to accessory devices due to speed disparities, leading to misplacement and decreased print quality, especially in continuous printing modes where ink is still wet, causing substrate curling and stiffness loss.
Innovation Solution
A movable media guide that forms a buffer region by shifting between two positions, guiding the substrate to downstream paths and creating a loop to decouple tension forces, with a sensor to dynamically control the buffer amount and adjust feed rates between the printer and accessory device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the substrate is transferred from the printing device to the accessory device at different speeds, then the printing device can maintain continuous operation, but vibrations and jams occur due to speed disparities
Solution Approach 1:
The media guide is made movable between a first position (guiding substrate to downstream path) and a second position (forming buffer region). This dynamic positioning allows the system to adapt between normal operation mode and buffer accumulation mode, enabling continuous printing while preventing transfer instability through active media guide adjustment.
Solution Approach 2:
The media guide acts as an intermediary element between the printing device and accessory device. By forming a buffer region that decouples the two devices, it mediates the speed disparity between them, allowing the printing device to operate continuously while the accessory device processes substrates at its own pace, thus preventing vibrations and jams.
2Reliability
If a buffer region is formed to decouple tension forces, then vibrations and jams are prevented, but the device complexity increases
Solution Approach 1:
The media guide serves multiple functions: it guides the substrate to the downstream path during normal operation, forms the buffer region when positioned in the second location, and can be controlled by a sensor-detectable mechanism. This multi-functionality eliminates the need for separate buffering components, reducing overall device complexity while maintaining reliability.
Solution Approach 2:
The buffer region is formed by the media guide itself rather than requiring a separate buffering device. The media guide uses its own positional adjustment to create the buffer space, and the sensor provides automatic detection and control. This self-service approach simplifies the system by making the existing component perform the buffering function without adding external complexity.
Data Source
Figure 1a~2
Figure 3a~3b
Figure 4~5
AI summary
A printing device (102) is described in which there is a media guide (120) that is arranged to guide a printable media substrate (106) from an upstream media path towards an input of the printing device or away from an output of the printing device towards a downstream media path (114a, 114b, 114c). The media guide is movable between a first position (121a) and a second position (121b). In the first position the media guide is arranged to guide the printable media along a respective media path. In the second position, which is spaced apart from the first position, the media guide forms a buffer region (304) into which a variable amount of media substrate can collect.