Printable Sheet Perforation for Printer Registration
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Solution Overview
Problem
Printers often experience gross off-registration and printing errors when processing cardstock sheets due to their thickness and stiffness, causing the sheets to bend or fold during the printing process, which leads to ink shifting and other errors.
Innovation Solution
A printable sheet assembly with robust perforation lines that provide a tensile strength of at least 80 Newtons per 2 linear inches, designed to prevent breakage during the printing process, is introduced. These perforation lines are strategically placed within fold regions to maintain alignment and registration, and alternate perforation lines are used to ensure smooth edge separation and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If cardstock sheets are used for printing, then the sheets provide durability and structural integrity, but the thickness and stiffness cause the sheets to bend or fold during printing, leading to gross off-registration and printing errors
Solution Approach 1:
The sheet is segmented into multiple sections separated by fold regions containing perforation lines. These perforation lines allow the sheet to be divided into manageable segments that can flex independently during printing, preventing the entire sheet from bending or folding and causing registration errors.
Solution Approach 2:
The sheet has different properties in different regions: the main body maintains high strength and stiffness for durability, while the fold regions contain perforation lines that provide controlled flexibility. This local differentiation allows the sheet to maintain structural integrity where needed while accommodating bending where required.
2Strength
If perforation lines are made robust with high tensile strength, then the perforation lines prevent breakage during printing, but the perforation lines must still allow for separation and maintain smooth edges
Solution Approach 1:
The perforation lines are designed with specific parameter ranges: tensile strength of at least 80 Newtons per 2 linear inches to prevent breakage, with cut lengths of 0.010 inches and tie lengths of 0.006-0.010 inches. These parameter changes optimize the balance between strength and separability.
Solution Approach 2:
The perforation line creates a composite structure with alternating cuts and ties. The cuts provide flexibility and separation capability, while the ties maintain structural integrity and prevent complete breakage. This composite approach allows the perforation line to simultaneously achieve high tensile strength and ease of separation.
Data Source
AI summary
A printable sheet assembly and method provide for feeding cardstock sheets through a printer. The printable sheet assembly may include a first fold region. The first fold region comprises a robust perforated line disposed horizontally across the sheet assembly. The printable sheet assembly may include a second fold region. The second fold region may comprise a second robust perforated line disposed horizontally across the sheet assembly. The sheet assembly may include a product such as a name tag, business card, label, or card formed into the sheet assembly and configured to be processed through a printer device to receive indicia thereon.