Detachable Pivotable Pressing Device for Jam-Resistant Media Alignment

Resolve Bottlenecks,
Find Innovative Solutions
Generate Solutions

Solution Overview

Problem

Existing medium-discharging devices face challenges with detachable pressing members that are prone to breakage during storage or transportation, and management of detached parts is cumbersome, while also risking media misalignment and jamming due to improper contact with the tray.

Innovation Solution

A medium-discharging device with a detachable pressing member that switches between contact and non-contact states, featuring a load-applying unit and regulated rotation to prevent breakage, and multiple contact points for stable media alignment, reducing jamming and enhancing user convenience.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the pressing member is detachably attached to avoid breakage during storage or transportation, then the reliability is improved, but the ease of operation deteriorates due to management of detached pressing member

Engineering Contradiction:
Improvepressing member breakage preventionVSAvoidmanagement of detached pressing member
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The pressing member is designed to be movable between a pressing position (contacting the medium) and a retracted position (disconnected from the medium), allowing it to adapt dynamically to different operational states. This dynamic configuration enables the pressing member to remain attached during operation while avoiding breakage, and eliminates the need to manage detached parts during storage or transportation.

Inventive Principle:
Principle #15Dynamics

2Manufacturing precision

If the pressing member is fixed to ensure stable contact with medium, then the manufacturing precision is improved, but the reliability deteriorates due to breakage risk during storage or transportation

Engineering Contradiction:
Improvemedia alignmentVSAvoidpressing member breakage
Core Design Contradiction:
Manufacturing precisionVSReliability

Solution Approach 1:

The pressing member transitions from a fixed configuration to a dynamic one, capable of moving between pressed and retracted states. This allows the system to maintain precise alignment during operation while avoiding the breakage risks associated with permanent fixed attachment during storage or transport.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The pressing member is designed as a separable component that can be detached from the device main body, allowing independent management of the pressing function. This segmentation enables the pressing member to be reattached or detached as needed, preventing breakage while maintaining alignment precision when attached.

Inventive Principle:
Principle #1Segmentation

3Reliability

If the pressing member is detached during storage or transportation, then the reliability is improved by avoiding breakage, but the device complexity increases due to management of detached parts

Engineering Contradiction:
Improvepressing member breakage preventionVSAvoidmanagement of detached pressing member
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The pressing member is integrated with the device main body through a detachable connection mechanism, combining the benefits of both fixed and separate configurations. When attached, it functions as part of the device; when detached, it can be stored separately without requiring complex management systems, thus reducing overall device complexity.

Inventive Principle:
Principle #5Merging (Combining)

4Manufacturing precision

If the pressing member contacts the medium continuously, then the manufacturing precision is improved for media alignment, but the reliability deteriorates due to jamming risk

Engineering Contradiction:
Improvemedia alignmentVSAvoidjamming prevention
Core Design Contradiction:
Manufacturing precisionVSReliability

Solution Approach 1:

The pressing member dynamically adjusts its contact with the medium by moving between pressed and retracted positions. This dynamic adjustment allows precise alignment when needed while reducing contact pressure or disengaging to prevent jamming, thereby resolving the contradiction between alignment precision and jamming prevention.

Inventive Principle:
Principle #15Dynamics

Data Source

PatentEP3936468B1Medium-discharging device with detachably mounted pivotable pressing device
Publication Date: 2025.08.27 SEIKO EPSON CORP
  • EP3936468B1 patent drawingFigure 1
  • EP3936468B1 patent drawingFigure 2
  • EP3936468B1 patent drawingFigure 3

AI summary

A medium-discharging device includes: a device main body including a medium-discharging section that discharges a medium; a medium-receiving tray that receives the medium discharged by the medium-discharging section; and a pressing member that is configured to be attached to and detached from the device main body and presses the medium discharged by the medium-discharging section against the medium-receiving tray in a state in which the pressing member is attached to the device main body, in which the pressing member is configured to switch, in the state in which the pressing member is attached to the device main body, between a first state in which the pressing member comes into contact with the medium-receiving tray and a second state in which the pressing member retreats upward so as to be apart from the medium-receiving tray.