Recording Device Medium Length Control for Jam Prevention

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Solution Overview

Problem

Existing recording devices face issues with correctly loading media when the remaining length of the medium is insufficient for recording, leading to potential jamming and alignment problems.

Innovation Solution

A recording device with a control unit that determines the remaining medium length and cuts it to a predefined length or less using a cutting mechanism, ensuring proper alignment and preventing jamming during discharge.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the medium corresponding to the last unrecordable portion is forcibly discharged by the discharge unit, then the medium is discharged from the discharge port, but the medium may be loaded on the guide means in a state in which the upstream end of the medium is curved

Engineering Contradiction:

Improvedischarge of remaining mediumVSAvoidalignment of medium

Core Design Contradiction:

ProductivityVSManufacturing precision

Solution Approach 1:

The cutting mechanism cuts the remaining medium to a predetermined length before discharge, preventing the upstream end from curving during discharge. This preliminary cutting action ensures that the medium is properly aligned when loaded onto the guide means, resolving the contradiction between discharging the remaining medium and maintaining alignment precision.

Inventive Principle:

Principle #10Preliminary action

2Device complexity

If the medium corresponding to the last unrecordable portion is discharged without cutting, then the discharge process is simplified, but the medium cannot be correctly loaded when the length is greater than the distance from the upstream end of the guide means to the restricting unit

Engineering Contradiction:

Improvedischarge processVSAvoidcorrect loading of medium

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The cutting mechanism performs a preliminary cut of the remaining medium to a predetermined length before discharge. This ensures that the medium length is appropriate for correct loading onto the guide means, preventing loading failures while maintaining a relatively simple discharge process.

Inventive Principle:

Principle #10Preliminary action

3Productivity

If the excessively long portion of the medium is forcibly discharged by the discharge unit, then the medium is discharged, but the medium becomes an obstacle to the discharge of the medium from the next roll, which may cause jamming

Engineering Contradiction:

Improvedischarge of remaining mediumVSAvoidsmooth discharge from next roll

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The cutting mechanism cuts the remaining medium to a predetermined length before discharge, preventing it from becoming an obstacle to the discharge of medium from the next roll. This preliminary cutting action eliminates the risk of jamming while ensuring smooth operation of the discharge unit.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

By cutting the remaining medium to a predetermined length before discharge, the system preemptively prevents the medium from curving and becoming an obstacle during discharge. This preliminary anti-action stops the potential jamming problem before it can occur, ensuring reliable operation.

Inventive Principle:

Principle #9Preliminary anti-action

4Ease of operation

If the medium is curved and lifted during loading, then the medium may be loaded onto the guide means, but it becomes an obstacle to the discharge of the medium from the next roll

Engineering Contradiction:

Improveloading of mediumVSAvoiddischarge operation

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The cutting mechanism cuts the remaining medium to a predetermined length before loading onto the guide means, preventing the medium from curving and lifting during the loading process. This preliminary cutting ensures that the medium remains straight and does not become an obstacle to subsequent discharge operations.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS12285941B2Recording device, recording system, and control method for recording device

Publication Date: 2025.04.29 SEIKO EPSON CORP

AI summary

A recording device includes a roll holding unit, a transport mechanism, a recording unit, a cutting mechanism, and a discharge unit. The recording unit performs recording on a transported medium from the roll. The cutting mechanism cuts the medium, in an intersecting direction intersecting a transport direction. The discharge unit discharges the medium cut by the cutting mechanism. The transport mechanism includes a transport roller pair disposed upstream of the recording unit in the transport path. The control unit determines that the remaining length L2 of the medium is insufficient to perform recording in a state of pinching the medium by the transport roller pair and the remaining length L2 is greater than the predetermined length (affirmative determination in step S14), the control unit cuts, by the cutting mechanism, a remaining medium to a predefined length L3 or less and discharges the remaining medium (steps S17 to S20).