Modular Print Bar Assembly for Adjustable Printhead Widths
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Solution Overview
Problem
Existing inkjet printers require different die cast frames for various image widths, making them expensive and inflexible for accommodating different print zone widths.
Innovation Solution
A modular print bar assembly with adjustable rods and end members allows for the assembly of printheads of varying widths without the need for multiple die cast frames, enabling the use of a scalable print bar assembly that can accommodate any number of printheads by using precision-cut steel rods and actuators to adjust the stitch position and maintain alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different die cast frames are used for various image widths, then the printer can accommodate different print zone widths, but the cost increases and flexibility decreases
Solution Approach 1:
The print bar assembly is divided into modular components: a base frame, multiple printhead carriers that can be independently positioned, and adjustable positioning mechanisms. This segmentation allows the same base frame to accommodate different numbers and configurations of printheads for various print zone widths, eliminating the need for multiple dedicated die cast frames for each width specification.
Solution Approach 2:
The invention introduces adjustable positioning mechanisms including actuators and movable carriers that allow dynamic reconfiguration of the print bar assembly. Theprinthead carriers can be positioned at different locations along the base frame, and the assembly width can be adjusted by adding or removing carriers, enabling the same hardware to adapt to different image widths without requiring multiple fixed die cast frames.
2Adaptability or versatility
If different die cast frames are used for various image widths, then the printer can accommodate different print zone widths, but the device complexity increases
Solution Approach 1:
A single universal base frame design is created that can support multiple printhead carriers in various configurations. The frame includes standardized mounting locations, uniform receptacle designs, and consistent actuator interfaces that allow the same frame structure to serve multiple print zone width requirements, reducing device complexity compared to maintaining separate dedicated frames for each width.
Solution Approach 2:
The invention allows parameter changes in the print bar assembly configuration by adjusting the number, position, and arrangement of printhead carriers on the base frame. Rather than changing the fundamental frame structure, the system modifies operational parameters (carrier positions, assembly width) to accommodate different image widths, simplifying the overall device architecture.
Data Source
AI summary
A modular printhead assembly facilitates the manufacture of printers with print zones of differing widths. The printhead assembly includes a pair of end pieces and a plurality of rods that extend between the end pieces in parallel. The rods pass through holes in lugs extending from carriers configured for the mounting of printheads. Plates are interposed between the printheads and the carriers to enable actuators to move the plates and printheads within the perimeters of the carriers to adjust the stitch and roll alignments of the printheads.