Interleavable Inkjet Printhead Layout for Compact Full-Color Printing

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Solution Overview

Problem

Existing pagewide inkjet printing systems face challenges with long print zones, alignment issues, and high costs due to the use of Invar ink manifolds, which are less suitable for high-volume manufacturing, and require complex media feed systems for integration with offset presses.

Innovation Solution

A cost-effective inkjet printhead design featuring a modular, interleavable printhead with a molded polymer manifold, dual rows of print chips, and a common PCB for power and data distribution, along with a tortuous ink pathway and flexible connectors to minimize print zone span and reduce manufacturing costs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If monochrome print bars are stacked to achieve full-color printing, then color printing capability is improved, but the overall span of the print zone becomes too long

Engineering Contradiction:

Improvefull-color printing capabilityVSAvoidprint zone span

Core Design Contradiction:

Adaptability or versatilityVSLength of moving object

Solution Approach 1:

The patent transitions from stacking print bars along the media feed direction (one dimension) to arranging print chips in multiple rows within a single printhead (two-dimensional arrangement). This allows full-color printing capability to be achieved within a compact footprint, dramatically reducing the print zone span from 500-1000mm to a much smaller dimension while maintaining CMYK color printing capability.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The patent combines multiple color printing capabilities into a single printhead by integrating multiple print chips (each capable of printing different colors) in a multi-row arrangement. This merging of previously separate monochrome print bars into one unified device achieves full-color printing while minimizing the overall print zone span.

Inventive Principle:

Principle #5Merging (Combining)

2Strength

If Invar ink manifolds are used to provide stiffness for long printheads, then structural rigidity is improved, but manufacturing cost increases and high-volume manufacturing becomes less suitable

Engineering Contradiction:

Improvestructural rigidityVSAvoidmanufacturing cost and volume production suitability

Core Design Contradiction:

StrengthVSEase of manufacture

Solution Approach 1:

The patent replaces expensive Invar ink manifolds with molded polymer ink manifolds. While polymer manifolds may have different mechanical properties, they enable high-volume manufacturing through molding processes, significantly reducing per-unit cost and making the system economically viable for high-volume production environments.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The patent changes the material parameter of the ink manifold from Invar (metal) to molded polymer. This material substitution fundamentally alters the manufacturing approach from precision metalworking to high-volume molding, reducing cost and improving scalability while the compact printhead design compensates for any differences in structural rigidity.

Inventive Principle:

Principle #35Parameter changes

3Ease of operation

If the print zone span is reduced to fit existing media feed systems, then integration ease is improved, but the number of print bars must be reduced

Engineering Contradiction:

Improveintegration with existing media feed systemsVSAvoidnumber of print bars

Core Design Contradiction:

Ease of operationVSAdaptability or versatility

Solution Approach 1:

The patent arranges print chips in multiple rows (e.g., 2 rows with 6 chips each) within a single printhead, utilizing the transverse dimension across the media width rather than extending along the media feed direction. This dimensional reorganization maintains full-color printing capability (equivalent to 4+ print bars) while compressing the print zone span to fit within existing media feed system constraints.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The patent merges the functionality of multiple print bars (CMYK color bars) into a single integrated printhead containing multiple print chip rows. This consolidation achieves the same color printing capability as separate print bars while reducing the longitudinal span to a fraction of the original length, enabling easy integration into existing media feed systems without reduction in printing capability.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS20260001336A1Interleavable low-cost inkjet printhead

Publication Date: 2026.01.01 MEMJET TECH LTD

AI summary

An inkjet printhead includes: an elongate manifold having a longitudinal central portion extending along a central longitudinal axis of the printhead; first and second longitudinal channel portions extending along respective longitudinal axes at opposite sides of the central portion; and first and second rows of butting print chips mounted to a base of the manifold, the first row of print chips extending along the first channel portion and the second row of print chips extending along the opposite second channel portion. Each of the first and second channel portions extends beyond the central portion at opposite ends of the manifold, such that respective opposite ends of the manifold have a re-entrant profile configured for complementary interleaving of a plurality of said printheads.