Printing Apparatus Blade Jam Resolution via Reversible Motor
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Solution Overview
Problem
Existing printing apparatuses often experience persistent jams due to motor-driven blade malfunctions or unsuitable paper, requiring manual operator intervention to resolve, which can be burdensome and potentially damaging.
Innovation Solution
An automated unlocking system for the motor-driven cutting device that reverses the rotor's rotation direction to decouple and then re-engage with the blade, allowing it to overcome jams without manual intervention, using a mechanism that transforms rotary motion into reciprocal motion to apply kinetic energy and resolve the jam.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If simple retrograde driving of the electric driving motor is used to solve blade jams, then the system remains simple, but the jam cannot be resolved when it is persistent
Solution Approach 1:
The patent applies dynamics by making the connection between the motor rotor and blade reversible rather than fixed. The coupling mechanism allows the rotor to be dynamically disconnected from the blade during retrograde rotation when a jam is detected, and then reconnected after the jam is resolved. This dynamic reconfigurability enables the system to overcome persistent jams that simple continuous retrograde driving cannot resolve.
2Reliability
If manual intervention is used to resolve blade jams, then the jam can be solved, but operator safety is compromised and continuous operation is interrupted
Solution Approach 1:
The patent implements self-service by enabling the cutting device to automatically resolve its own jams without external manual intervention. The control system detects when a jam occurs, automatically reverses the rotor direction, decouples and recouples the blade mechanism, and continues operation. This self-diagnosis and self-correction capability eliminates the need for operators to manually clear jams, improving both safety and operational continuity.
Solution Approach 2:
The system uses feedback through sensors that monitor the operational state of the cutting device to detect jams. When a jam is detected, the control system receives this feedback signal and automatically initiates the rotor reversal and coupling mechanism activation. This closed-loop feedback system enables automated jam resolution without requiring operator intervention.
3Reliability
If the movable blade is driven backwards to solve jam, then the jam may be resolved, but the blade may remain locked in advanced position preventing lid lifting
Solution Approach 1:
The patent applies the extraction principle by removing the movable blade from its engagement with the stationary blade during retrograde rotation. The coupling mechanism extracts or decouples the blade connection when the rotor reverses direction, allowing the movable blade to be pulled back to its retracted position. This decoupling action prevents the blade from remaining locked in the advanced position and enables the lid to be lifted without damage.
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 efficient and automated resolution of blade jams, reducing the need for manual intervention and preventing damage to the cutting device, ensuring continuous operation of the printing apparatus.
Implementation Method 1
a motor-driven blade (5) cooperating with a stationary blade (6)
Implementation Method 2
a mechanism that transforms rotary motion into reciprocal motion
Data Source
Figure 1~2
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AI summary
A printing apparatus is disclosed, in which a printed document is separated from a continuous strip of paper by a blade driven by a reversible motor that has a forward rotation direction, in normal operation, and a backward rotation direction, for blade unlocking in the event of jamming of the blade, in which the backward rotation first has a free initial portion without transmitting force to the blade, then a tooth carried by the motor shaft knocks against another tooth carried by a hub of a gear that transmits force to the blade, unlocking the jam thereof.