Image Forming Apparatus Sheet Separation and Inner Sheet Insertion
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Solution Overview
Problem
Existing image forming apparatuses face challenges in efficiently inserting an inner sheet into a two-ply sheet without increasing size and preventing sheet separation failures, due to space and time requirements for temporary retention and heat-induced bonding issues.
Innovation Solution
An image forming apparatus with a sheet separation device, first and second sheet feeders, an image forming device, and a heat source, where the sheet separation device is positioned downstream from the image forming device, and the heat source is upstream, allowing the two-ply sheet to detour the heat source, enabling efficient insertion of the inner sheet between the two sheets without heat-induced bonding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the recording medium is temporarily retained in the image forming apparatus after image formation to allow insertion into the two-ply sheet, then the insertion operation can be performed, but the apparatus increases in size and the operation time increases, reducing productivity
Solution Approach 1:
The non-bonding portion of the two-ply sheet is separated in advance by the sheet separation device before the recording medium needs to be inserted. This preliminary separation eliminates the need for temporary retention space and reduces the time required for the insertion operation, thereby maintaining ease of operation while improving productivity
Solution Approach 2:
The sheet separation device extracts and separates the non-bonding portion of the two-ply sheet from the bonded portion. By taking out this non-bonding portion in advance, the system eliminates the need for temporary retention mechanisms and reduces overall apparatus size while enabling efficient insertion operation
2Ease of manufacture
If the two-ply sheet passes through the heat source before the recording medium is inserted, then the sheet can be processed, but the two-ply sheet becomes bonded due to heat, making subsequent separation difficult
Solution Approach 1:
The sheet separation device performs the separation of the non-bonding portion of the two-ply sheet before the sheet passes through the heat source. This preliminary separation ensures that the sheet can be easily separated later after the recording medium is inserted, while still allowing the bonded portion to be properly processed by the heat source
Solution Approach 2:
The two-ply sheet is segmented into a bonded portion and a non-bonding portion. The sheet separation device specifically separates the non-bonding portion, allowing differential treatment: the bonded portion passes through the heat source for proper processing while the separated non-bonding portion remains easily separable for subsequent insertion operations
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration reduces the size of the apparatus, enhances productivity by minimizing time for sheet insertion, and prevents sheet separation failures by avoiding heat-induced bonding of the two-ply sheet.
Implementation Method 1
an automatic lamination set device that is disposed upstream from a fixing device (heat source) in the image forming apparatus separates (peels) the non-bonding portion of the lamination member (i.e., two-ply sheet)
Implementation Method 2
a sheet separation device separates a non-bonding portion of a two-ply sheet in which two sheets are overlapped and bonded together at one end as a bonding portion of the two-ply sheet
Data Source
Figure 1
Figure 2~3B
Figure 4A~4B
AI summary
An image forming apparatus (100) includes a sheet separation device (1) configured to separate a two-ply sheet (PJ) in which two sheets (PI, P2) are overlapped and bonded together at one end of the two-ply sheet (PJ), a first sheet feeder (11, 114) configured to feed the two-ply sheet (PJ), a second sheet feeder (112, 197) configured to feed an inner sheet (PM) to be inserted between the two sheets (PI, P2), an image forming device (101, 125) configured to form an image on the inner sheet (PM) fed from the second sheet feeder (112, 197), a heat source (120, 130) disposed upstream from the sheet separation device (1) in the sheet conveyance direction, and a controller (500) configured to cause the two-ply sheet (PJ) fed from the first sheet feeder (11, 114), to detour the heat source (120, 130) to the sheet separation device (1).