Curl Correcting Apparatus with Eccentric Cam Adjustment
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Solution Overview
Problem
Existing curl correcting apparatuses for recording paper are large in size and costly due to the need for separate motors for paper transportation and curl correction, which complicates the adjustment of curl correction amounts based on varying paper materials.
Innovation Solution
A curl correcting apparatus with a single rotary driving portion that includes a pair of rollers with different hardness, an adjustment mechanism using an eccentric cam, and a clutch system to transmit rotary force for both paper transportation and curl correction, allowing for adjustable nip pressure and distance between rollers to correct curls efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate motors are used for paper transportation and curl correction, then the curl correction amount can be adjusted, but the apparatus becomes large in size and costly
Solution Approach 1:
The patent combines the paper transportation function and curl correction function into a single roller system. The roller serves dual purposes: transporting the recording paper and correcting its curl by adjusting the pressure between the roller and the paper. This eliminates the need for separate motors for each function, thereby reducing apparatus size and cost while maintaining curl correction adjustability
Solution Approach 2:
The single roller is designed to perform multiple functions simultaneously. By adjusting the pressure between the roller and the recording paper, the same roller that transports the paper also corrects its curl. This multi-functional design allows one component to replace what would traditionally require separate dedicated components, reducing overall system complexity
2Manufacturing precision
If the pressure between rollers is increased to correct larger curls, then curl correction effectiveness improves, but the apparatus structure becomes more complex
Solution Approach 1:
The patent implements a dynamic adjustment mechanism where the pressure between the roller and the recording paper can be varied. The roller's position or pressure application point can be adjusted along the paper path, allowing the pressure to be optimized for different curl amounts and paper types. This dynamic adjustability enables effective curl correction without requiring an overly complex fixed-structure system
Solution Approach 2:
The patent changes physical parameters such as the roller's pressure, position, or material properties to achieve different curl correction效果的。By adjusting these parameters, the same basic roller structure can effectively handle a range of curl conditions without requiring fundamentally different mechanical structures for each scenario
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 curl correction and transportation of recording paper with a single rotary driving portion, reducing the size and cost of the apparatus while allowing for adjustable curl correction based on paper type, ensuring smooth paper transportation and effective curl adjustment.
Implementation Method 1
a clutch portion that transmits a rotary driving force of the rotary driving portion to the first roller during the forward rotation and to the adjustment rotation shaft during the reverse rotation
Implementation Method 2
an adjusting portion that includes an adjustment rotation shaft having an abutting portion and that adjusts a distance to the first roller as a result of the abutting portion pressing against, in accordance with a rotation amount of the adjustment rotation shaft, the second roller
Data Source
AI summary
A curl correcting apparatus includes rollers, a motor, and a clutch portion. The rollers are curl correction-use rollers which are arranged in parallel to each other in a pressure-contact state and which are different in hardness. The motor is a motor capable of rotating in forward and reverse directions relative to a correction-amount adjusting portion that changes and adjusts a distance to the rollers as a result of an eccentric cam that integrally rotates in accordance with a rotation amount of a rotation shaft, pressing against the rollers. The clutch portion transmits a rotary driving force of the motor to the rollers during the forward rotation and to a rotation shaft during the reverse rotation.