Sheet Package Detection Hole for Out-of-Paper Detection
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Solution Overview
Problem
Conventional sheet packages do not have a structure for immediate detection of the out-of-paper condition and result in increased waste of sheet material when the package member is cut out, especially when the sheets stored are of larger size.
Innovation Solution
A sheet package with a package member that includes a rectangular first portion, a second portion connecting with the first portion, and a detection hole or cutout for immediate detection of sheet presence or absence, allowing the second portion to be folded and exposing part of the stack, reducing the need for extended sheet material when cut out.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the package member includes a rectangular wall portion extending from the bottom portion to cover the upper face of stacked sheets, then the sheets are protected, but the length in the longitudinal direction of the package member is increased and the amount of sheet material wasted is increased
Solution Approach 1:
The package member structure transitions from a traditional box-like form to a flat sheet-like configuration. The package member is designed as a substantially flat structure with a first region, second region, and third region arranged in a planar layout rather than extending vertically. This dimensional change allows the package to protect sheets while minimizing the amount of material required, as the protective covering is achieved through the flat sheet structure itself rather than through extended vertical walls.
2Reliability
If the conventional sheet package structure is used, then the package member can protect sheets, but the printer cannot immediately detect the out of paper condition
Solution Approach 1:
The package member is pre-designed with an exposed region that is visible from the front before the sheets are completely consumed. This exposed region acts as a preliminary indicator that alerts the user or system in advance that sheets are running low. The detection hole or cutout is positioned such that it allows optical detection mechanisms to sense the presence or absence of sheets through the package member structure itself, enabling immediate detection without waiting for the traditional time-based threshold.
3Loss of time
If the detection hole or cutout is provided at a position facing the second portion, then immediate detection is enabled, but the structure becomes more complex
Solution Approach 1:
The package member is designed to serve multiple functions through its flat sheet structure. The first region, second region, and third region collectively provide sheet protection, detection capability, and structural integrity in a single integrated component. The detection hole or cutout is incorporated into this multi-functional design without requiring separate detection devices or complex mechanisms. The flat sheet structure itself becomes the detection medium, allowing optical sensors to detect sheet presence through the transparent or translucent portions of the package member.
Data Source
AI summary
A sheet package is manufactured by folding a thin rectangular package member into a box-like shape and stores a stack of a plurality of cut-sheet type heat-sensitive sheets of small size, for example, of A6 or A7 size. A user purchases a sheet package marketed in a box-like shape, opens a lid portion and folds it back towards a bottom side. Then, an insertion portion of the lid portion is inserted into a slit in the bottom portion of the package member so as to expose sheets stored inside, and the sheets are loaded together with the package member in a sheet storage portion of a printer.