Envelope Fixing Controller Dynamic Nip Pressure Adjustment
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Solution Overview
Problem
Existing image forming apparatuses face challenges in satisfactorily fixing toner images on envelopes while preventing creasing, especially with the increasing variety in envelope sizes and materials, as they often require multiple fixation settings that are impractical to implement.
Innovation Solution
An image forming apparatus with a fixing portion that adjusts its conditions based on a user-selected correction level for crease prevention, using a controller to modify the fixing conditions, including nip pressure, temperature, and conveyance speed, to accommodate different envelope types and sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If high fixation pressure is applied to ensure satisfactory image fixation quality, then image fixation quality is improved, but envelope creasing occurs
Solution Approach 1:
The fixing apparatus dynamically adjusts the fixation pressure based on the selected crease correction level. The pressure can vary during the fixing process, applying higher pressure where needed for image quality and lower pressure to prevent creasing, resolving the contradiction between these two requirements
Solution Approach 2:
The apparatus changes the fixation pressure parameter according to the crease correction level selected by the user. By modifying this physical parameter, the system can achieve both satisfactory image fixation and prevent envelope creasing under different operating conditions
2Manufacturing precision
If fixation conditions are optimized for one envelope type, then image quality for that type is improved, but the apparatus cannot handle other envelope types satisfactorily
Solution Approach 1:
The fixing apparatus is designed to handle multiple envelope types by providing selectable crease correction levels that can be adjusted based on the specific envelope being processed. This makes the apparatus universal rather than specialized for one envelope type
Solution Approach 2:
The apparatus dynamically adapts its fixation conditions based on the selected crease correction level, which corresponds to different envelope types. This dynamic adjustment capability allows the same apparatus to optimally process various envelope types without requiring multiple dedicated fixing units
3Adaptability or versatility
If multiple fixation settings are provided for different envelope types, then adaptability to various envelope types is improved, but device complexity increases
Solution Approach 1:
Instead of providing multiple fixed settings, the apparatus uses a dynamic adjustment mechanism where the fixation pressure can be continuously or steplessly varied according to the selected crease correction level. This reduces complexity compared to having multiple discrete settings for each envelope type
Solution Approach 2:
The apparatus simplifies the interface by allowing users to select from a limited number of crease correction levels, which automatically adjust the fixation pressure parameter. This is simpler than requiring users to manually configure multiple independent fixation settings for different envelope types
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
Enables the production of high-quality images on envelopes of various sizes and materials by effectively preventing creasing through customizable fixing conditions, enhancing the apparatus's versatility and user convenience.
Implementation Method 1
a fixing apparatus that uses a combination of heat and pressure to fix a toner image transferred onto a sheet of recording medium
Implementation Method 2
a fixing apparatus that uses a combination of heat and pressure to fix a toner image transferred onto a sheet of recording medium
Data Source
AI summary
An image forming apparatus includes an image forming station configured to form a toner image on a recording material, a fixing portion configured to fix the toner image formed by the image forming station on the recording material, a selector configured to select a correction level for correcting a crease of an envelope, by an operator, and a controller configured to control a fixing condition in response to the correction level selected on the selector.