Ink Jet Head Supporting Plate Projection Nozzle Positioning
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Solution Overview
Problem
In ink jet recording apparatuses using serial printing methods, the speed of scanning is limited due to the need for short heads with special shapes to compensate for the thickness of the head supporting plate, resulting in inefficient recording area coverage.
Innovation Solution
The apparatus allows for the use of standard short heads with ordinary specifications by employing a head supporting plate with a projection that adjusts the nozzle position independently of the carriage thickness, enabling precise mounting and registration of line heads for improved fabric printing quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a head supporting plate of given thickness is used to mount short heads, then the nozzle surface must be projected greater by the thickness amount from the main body, but this requires short heads with special shapes which complicates manufacturing and reduces efficiency
Solution Approach 1:
The head supporting plate is segmented into a main body portion and a separate projection portion. The projection extends from the main body to position the nozzle surface at the required distance from the recording medium, allowing standard short heads to be used without modification while maintaining proper nozzle positioning.
Solution Approach 2:
The projection on the head supporting plate acts as an intermediary element between the standard short head and the recording medium. It provides the necessary height adjustment without requiring modification of the short head itself, thus simplifying manufacturing while maintaining positioning accuracy.
2Productivity
If the scanning speed is increased to improve production efficiency, then the recording area coverage becomes insufficient, but increasing the area requires more complex head arrangements
Solution Approach 1:
The invention uses multiple line heads arranged in rows with different scanning speeds. By dynamically controlling the relative scanning speeds of different line heads, the system can cover a larger recording area while maintaining high overall productivity, as faster heads cover more ground while slower heads ensure complete coverage.
Data Source
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AI summary
An ink jet recording apparatus in which a head supporting plate having a line head mounted thereon which comprises a plurality of short heads staggered is attached to a carriage whereby recording is performed by ink jet printing with the line head on a recording medium positioned beneath the carriage is rendered capable of using ordinary short heads. To this end, in an ink jet recording apparatus in which a head supporting plate 12 having a line head mounted thereon which comprises a plurality of short heads 11 staggered is attached to a carriage 9 whereby recording is performed by ink jet printing with the line head on a recording medium 2 positioned beneath the carriage, a portion of projection 25 is provided which is formed on a surface of attachment where the head supporting plate is attached to the carriage, the portion of projection entering into a hole 26 formed in the carriage; and a portion of recess is provided which is formed on an obverse side of the head supporting plate and at a position corresponding to that of the portion of projection and whose inner bottom surface becomes a head mounting surface 27 on which a said short head having a nozzle is to be mounted, the head mounting surface being formed with a nozzle accepting hole adapted to accept the nozzle of the short head for mounting the short head on the head mounting surface.