Tab-Free Paperboard Envelope Blank for Lower Material Waste
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Solution Overview
Problem
Existing paperboard envelope manufacturing processes often result in material waste and inefficiencies due to the use of tabs or extensions along the edges, leading to increased processing time and costs.
Innovation Solution
A single rectangular sheet of paperboard is used to form a blank for a paperboard envelope, with specific zones configured to join and secure without tabs or extensions, utilizing adhesive application and a fold line to create a seamless envelope structure that can be closed with a peel-and-seal fastener and opened using a tear strip.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If tabs or extensions are added to the edges of paperboard envelope blanks, then the envelope can be assembled and secured, but material waste increases and processing time increases
Solution Approach 1:
The invention removes the unnecessary tabs or extensions from the envelope blank design. By eliminating these extra components, the patent achieves secure envelope assembly through adhesive application on the main body panels only, without requiring additional tab elements. This extraction of unnecessary parts directly reduces material waste while maintaining assembly reliability.
Solution Approach 2:
The invention merges the securing function into the main body panels of the envelope blank. Instead of having separate tabs that need to be attached, the adhesive application areas on the front and back panels directly provide the securing function. This merging eliminates the need for additional components and reduces overall material usage while maintaining assembly reliability.
2Reliability
If tabs or extensions are added to the edges of paperboard envelope blanks, then the envelope can be assembled and secured, but processing time and costs increase
Solution Approach 1:
The invention removes the time-consuming steps associated with handling and assembling separate tab components. By eliminating tabs from the design, the manufacturing process requires fewer cutting, folding, and assembling operations, directly reducing processing time while maintaining secure envelope assembly through simplified adhesive application.
Solution Approach 2:
The invention incorporates adhesive application areas directly into the blank design during manufacturing, so that the securing function is pre-prepared. This preliminary integration of adhesive zones into the main panels eliminates the need for separate tab assembly steps, reducing processing time while ensuring reliable envelope assembly.
3Loss of substance
If a single rectangular sheet is used without tabs or extensions, then material waste is minimized and processing efficiency is improved, but the envelope may not secure properly
Solution Approach 1:
The invention applies local quality by creating specific adhesive application zones on the front and back panels at precise locations. These localized adhesive areas are strategically positioned to provide secure attachment when the envelope is assembled, ensuring proper securing without requiring additional tab materials. The adhesive zones are concentrated where needed rather than distributed across entire surfaces.
Solution Approach 2:
The invention changes the parameter of the blank from including extra tab components to having integrated adhesive application areas. By modifying the structural parameters to include adhesive zones directly on the main panels with specific dimensions and positions, the envelope achieves proper securing through the adhesive properties rather than through mechanical tab extensions, minimizing material waste.
Data Source
AI summary
A blank including a single rectangular sheet of paperboard having opposed top and bottom edges and opposed left and right edges. The sheet has a midline spaced equally from the left and right edges, with a cut that extends from the top edge to a point spaced from the top edge, and a fold line that extends from the point to the bottom edge. The sheet also has a first zone that extends from midline to right edge along the bottom edge, a second zone that extends from bottom edge to a line spaced from the top edge along the right edge, a third zone that extends from midline to left edge along the bottom edge, and a fourth zone that extends from bottom edge to the line along the left edge. The first and second zones are configured to join the third and fourth zones.