Printing Device Receiver Slope Guides Media to Prevent Jams
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Solution Overview
Problem
Printing devices face issues with jams caused by slack recording media when pulled back during operations, leading to folding and piling up inside the device.
Innovation Solution
The printing device incorporates a roll holder, a support table, a print head, a conveyor, and a receiver with a downwardly sloping receiving portion to guide the pulled-back recording medium, preventing it from piling up and reducing the risk of jams.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the conveyor transfers the recording medium rearward to pull back the recording medium toward the roll holder, then the recording medium can be repositioned, but the recording medium becomes slack and sags between the feed path and the roll, causing it to fold over and jam
Solution Approach 1:
The receiver is positioned and configured in advance to receive the recording medium before it can sag and fold. The downwardly sloping receiving portion is prepared to guide the medium smoothly, preventing the harmful effect of folding before it occurs during the pull-back operation.
Solution Approach 2:
The receiver acts as an intermediary component between the feed path and the roll holder. It provides a transitional path with a downward slope that mediates the movement of the recording medium during pull-back, preventing direct contact and folding between the medium and the roll holder area.
2Device complexity
If a traditional feed path with opposing members is used, then the structure is simple, but the slack recording medium has nowhere to go when pulled back, causing it to pile up and jam
Solution Approach 1:
The receiver introduces a new spatial dimension below the feed path. Instead of keeping the medium constrained in the horizontal feed path plane, the downwardly sloping receiving portion guides the medium into a vertical downward direction, providing a new dimensional path for slack medium disposal.
Solution Approach 2:
The harmful effect of slack medium accumulation is extracted from the feed path system by providing a separate receiver component. The receiver is spaced away from the transfer path, creating a dedicated zone for handling pulled-back medium that is separated from the main feeding 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
The solution effectively reduces or prevents jams by guiding the slack recording medium downward along the slope of the receiver, ensuring smooth operation and minimizing paper jams.
Implementation Method 1
a receiver that is below and spaced away from a transfer path of the recording medium extending from the medium roll to the support table along which the recording medium is drawn from the medium roll and transferred. The receiver is capable of receiving the recording medium pulled back toward the roll holder, and includes a receiving portion that slopes downward and extends forward or rearward. When the recording medium sagging from the transfer path due to the pull-back operation of the conveyor falls on the receiving portion, the recording medium is gradually guided downward along the downward slope of the receiving portion.
Data Source
AI summary
A printing device includes a roll holder to support a recording medium roll so as to be rotatable in a front-rear direction, a support table that is higher than the roll holder and supports the recording medium drawn from the medium roll, a print head, a conveyor to transfer the recording medium forward on the support table to draw the recording medium from the medium roll and transfer the recording medium rearward on the support table to pull back the recording medium toward the roll holder, and a receiver that is lower than and spaced away from a transfer path of the recording medium extending from the medium roll to the support table along which the recording medium is drawn from the medium roll and transferred. The receiver is capable of receiving the pulled-back recording medium, and includes a receiving portion that slopes downward while extending forward or rearward.