Envelope Printing Apparatus Flap Position Detection
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Solution Overview
Problem
Conventional printing apparatuses struggle to correctly print images on envelopes with varying flap positions, leading to jams and incorrect image orientation due to limited setting methods that do not accommodate envelopes with closed or rotated flaps.
Innovation Solution
A printing apparatus with a holding unit, determining unit, and control unit that assesses the envelope's flap position and orientation, allowing for accurate image direction adjustment based on user input to ensure proper printing alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If an envelope with its flap closed is set with its flap located on the back end in the conveyance direction, then the envelope can be fed through the printing apparatus, but the tip end of the closed flap is stuck in the conveyance path causing a jam
Solution Approach 1:
The patent applies inversion by allowing the envelope to be set with its flap at the front end (opposite to the conventional back end position) when the flap is closed. This reverses the conventional setting rule to accommodate envelopes with closed flaps, enabling them to be fed without jams while still allowing printing on the correct surface.
2Reliability
If an envelope with its flap closed is set with its flap located on the front end in the conveyance direction, then jam occurrence is reduced, but the position of the flap is opposite to that of an envelope with its flap opened causing incorrect image printing direction
Solution Approach 1:
The patent applies dynamics by making the image printing direction adjustable based on the envelope setting. The control unit dynamically changes the image direction according to whether the flap is at the front end or back end, allowing the system to adapt to different envelope configurations and maintain correct printing orientation regardless of how the envelope is loaded.
Solution Approach 2:
The patent applies parameter changes by modifying the image printing direction parameter based on the flap position. When the flap position changes (front vs. back end), the system automatically adjusts the image orientation parameter to ensure correct printing, thereby maintaining manufacturing precision across different envelope settings.
3Reliability
If only one envelope setting method is provided with the flap at the back end, then jam occurrence is prevented for opened flaps, but envelopes with closed or rotated flaps cannot be printed correctly
Solution Approach 1:
The patent applies universality by enabling the printing apparatus to handle multiple envelope configurations (opened flap at back end, closed flap at front end, rotated flaps). The control unit universally accommodates different envelope types by automatically adjusting image printing directions based on detected flap positions, making the system versatile for various envelope settings.
Solution Approach 2:
The patent applies feedback by detecting the actual flap position of the loaded envelope and using this information to automatically adjust the image printing direction. The system receives feedback about the envelope configuration and responds by modifying printing parameters, ensuring correct image orientation regardless of how the envelope was loaded.
Data Source
AI summary
A printing apparatus prints an image in a right direction based on an open/close state of a flap of a held envelope and on a position of the flap received from a user. A control method for controlling a printing apparatus, includes determining whether an envelope having a flap is held by a holding unit with its flap opened or the envelope is held by the holding unit with its flap closed, receiving, from a user, a front end, a far side, or a back end in the conveyance direction of the envelope as a position of the flap of the envelope held by the holding unit, and performing control such that a direction of an image to be printed on the envelope is decided based on a result of the determination and on the received position of the flap, and the image is printed on the envelope.