Printer Load Measuring System for Film Exposure Positioning
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Solution Overview
Problem
Existing printer devices require a film detection device to accurately start exposure in instant film printing, which increases costs and complexity by necessitating additional components and space.
Innovation Solution
A printer device with a load measuring system, including a rotary encoder, that detects changes in load during film transport to determine the correct exposure start position without the need for a film detection device, using a processor to output an exposure start signal based on measured load changes and encoder pulse signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a film detection device is used to accurately start exposure, then exposure positioning accuracy is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent removes the film detection device from the system and replaces it with a load measuring device that detects film entry through load changes on the transport roller. This extraction of the detection function to a different measurement approach (load-based rather than optical/electrical detection) resolves the contradiction by maintaining positioning accuracy while reducing device complexity
Solution Approach 2:
The patent replaces the mechanical/optical film detection system with a load measurement system that uses a load cell or strain gauge to detect film entry. This substitution of the detection mechanism from complex film-specific detection to general load measurement achieves the same positioning function with simpler, more universal components
2Measurement precision
If a film detection device is used to accurately start exposure, then exposure positioning accuracy is improved, but manufacturing cost increases
Solution Approach 1:
By extracting the film detection function and replacing it with a load measurement system, the patent eliminates the need for specialized film detection components, thereby reducing manufacturing cost while maintaining the ability to accurately determine exposure start position
Solution Approach 2:
The load measuring device serves multiple functions: it detects film entry, triggers exposure start, and can potentially monitor film transport status. This multi-functionality reduces the need for separate detection components, lowering manufacturing cost while maintaining measurement precision
3Measurement precision
If a film detection device is used to accurately start exposure, then exposure positioning accuracy is improved, but additional components and space are required
Solution Approach 1:
The patent merges the film entry detection function with the existing transport roller system by using load measurement on the roller itself. This integration eliminates separate detection components and their associated mounting space, resolving the contradiction between positioning accuracy and component count
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 accurate exposure start positioning without the need for a film detection device, reducing manufacturing costs and device complexity while maintaining print quality.
Implementation Method 1
the rotary encoder device is provided at an end portion of a rotating shaft of the transport roller and outputs a pulse signal according to a rotation of the transport roller
Implementation Method 2
a load measuring device that measures a change in load occurring in a case where the film enters at least the spreading roller or the transport roller
Implementation Method 3
an exposure head device that is disposed to face a photosensitive surface of the film discharged from the film cartridge and exposes the film to light
Data Source
AI summary
There are provided a printer device, a printing method, and a program that can appropriately output an exposure start signal without requiring a film detection device. A printer device includes a loading chamber into which a film cartridge is to be loaded, an exposure head device that is disposed to face a photosensitive surface of a film discharged from the film cartridge and exposes the film to light, a spreading roller that splits a developer pod of the film to spread a developer to the film, a transport roller that transports the film, and a load measuring device that measures a change in load occurring in a case where the film enters at least the spreading roller or the transport roller.