Movable Post Processing Unit for Printing Apparatus

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Solution Overview

Problem

In printing apparatuses with post processing units positioned downstream of the printing means, the visibility and operability for users from the downstream side are compromised due to the obstruction caused by these units, particularly during manual sheet feeding operations.

Innovation Solution

A post processing unit, such as a color measuring sensor unit, is designed to shift between a first position where it supports the sheet during printing and a second position where it does not, allowing it to move out of the way and create a clear path for manual feeding, thereby improving visibility and operability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the post processing unit is arranged downstream of the printing means, then the post processing can be performed on the sheet after printing, but the visibility and operability for users from the downstream side deteriorates due to obstruction

Engineering Contradiction:
Improvepost processing functionVSAvoidvisibility and operability
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The post processing unit is designed to be movable rather than fixed, allowing it to shift between a first position (downstream of printing means) where it performs post processing functions, and a second position (upstream of printing means) where it does not obstruct the user's view and access to the discharge component, thus resolving the contradiction between maintaining post processing capability and improving visibility/operability

Inventive Principle:
Principle #15Dynamics

2Reliability

If the post processing unit is positioned downstream of the printing means, then the sheet can be processed after printing, but the path for manual sheet feeding becomes obstructed

Engineering Contradiction:
Improvepost processing capabilityVSAvoidmanual sheet feeding operability
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The post processing unit shifts to the upstream position when manual sheet feeding is required, clearing the downstream path for users to manually feed sheets into the printing apparatus, while still maintaining the capability to perform post processing when needed by returning to the downstream position

Inventive Principle:
Principle #15Dynamics

Data Source

PatentUS8991998B2Printing apparatus
Publication Date: 2015.03.31 CANON KK
  • US8991998B2 patent drawing
  • US8991998B2 patent drawing
  • US8991998B2 patent drawing

AI summary

In a printing apparatus with a unit for performing a post processing after printing, visibility and operability from the downstream side can be improved. The printing apparatus includes a first unit configured to perform printing on a sheet; and a second unit configured to perform a predetermined process for the sheet, the second unit being capable of shifting between a first position and a second position. A part of the second unit becomes a support of the sheet for printing by the first unit when the second unit is in the first position, and the part does not become the support when the second unit is in the second position.