Print Substrate Stack Handling Module for Unattended Media Switching
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Solution Overview
Problem
Existing print substrate stack handling modules are not capable of unattended printing of different print jobs, as they require manual intervention to switch between different media types and handle stack management efficiently.
Innovation Solution
A print substrate stack handling module with a releasable stack support mechanism, where a drawer with a releasable stack support can be inserted over a liftable stack support, allowing for easy switching between different media types and enabling unattended printing by moving substrates between the releasable stack support and a printer's transport path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single substrate engager and liftable stack support are used, then substrate handling is simplified, but the system cannot handle multiple media types without manual intervention
Solution Approach 1:
The system divides the substrate supply into multiple independent drawers, each capable of holding a different media type. Each drawer can be independently inserted or withdrawn, allowing the system to switch between media types by simply changing which drawer is active, without requiring manual intervention to reconfigure the entire system.
Solution Approach 2:
The drawer assembly is made dynamically reconfigurable through horizontal translation between buffer position and active position. This dynamic positioning allows the system to adapt to different media types on-demand, enabling unattended printing by automatically presenting the correct media type to the substrate engager.
2Adaptability or versatility
If multiple drawers are added to handle different media types, then versatility improves, but device complexity increases
Solution Approach 1:
Each drawer is designed with a universal structure that includes its own releasable stack support, allowing any drawer to function independently as a complete substrate supply unit. This modular universality means that adding more drawers does not require adding complex unique mechanisms to each one, thereby limiting the increase in overall device complexity.
Solution Approach 2:
The releasable stack support within each drawer is designed to nest with the liftable stack support mechanism. When a drawer is in the active position, its stack support integrates with the main lifting mechanism, allowing the system to treat multiple drawers as a unified structure during operation, thereby reducing the apparent complexity of handling multiple independent systems.
3Productivity
If manual intervention is required to switch media types, then operation control is simplified, but productivity decreases
Solution Approach 1:
The system enables self-service operation by allowing drawers to be pre-loaded with different media types and automatically positioned by the liftable stack support mechanism. The substrate engager automatically engages substrates from the active drawer without operator intervention, allowing the system to service itself during printing operations and thereby increasing productivity.
Solution Approach 2:
Multiple drawers can be pre-loaded with different media types in advance while the system is operating. The controller can pre-position the liftable stack support to anticipate upcoming media type changes, allowing the system to be prepared for future print jobs before they are assigned, thereby enabling continuous unattended operation and increasing overall productivity.
Data Source
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AI summary
A compact and efficient method for handling substrates of different media types for different print jobs without operator interference is provided. The method comprises the steps of: - inserting a drawer (40, 40', 40") comprising a releasable stack support (42) over a first stack (11) of substrates on a liftable stack support (13); - releasing the releasable stack support (42) from the drawer (40, 40', 40"), such that the releasable stack support (42) is supported by the first stack (11) on the lift stack support (13); - lifting the releasable stack support (42) within a working range of a single substrate engager (20) by lifting the liftable stack support (13); - moving a substrate (46) between the releasable stack support (42) and a transport path (30) of a printer by means of the single substrate engager (20); - withdrawing the releasable stack support (42); and - lifting the liftable stack support (13), so that the first stack (11) is positioned within the working range of the single substrate engager (20).