Removable Filter Cap for Pneumatic Sheet Holding Device
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Solution Overview
Problem
Printing machine filters become clogged with paper dust over time, losing effectiveness and are difficult to maintain as they get dirty when cleaned within the machine.
Innovation Solution
The filter is designed to be removable and washable, with a cap and filter assembly that can be easily detached and replaced outside the machine, using a snap connection for easy maintenance, and adjustable suction cups for improved sheet handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If the filter is cleaned inside the machine using blown air, then the filter can be maintained, but the machine interior becomes contaminated with paper dust
Solution Approach 1:
The filter is extracted from the machine interior by making it part of a removable cap assembly. The cap with integrated filter can be completely detached from the suction cup, allowing the filter to be cleaned or replaced outside the machine, thus preventing contamination of the machine interior during maintenance operations.
Solution Approach 2:
The suction cup assembly is segmented into separable components: the cap containing the filter, the suction cup body, and the connection elements. This segmentation allows the filter-containing cap to be removed independently for maintenance without affecting the rest of the machine, solving the contradiction between maintaining the filter and preventing machine contamination.
2Ease of repair
If the filter is made removable for external cleaning, then maintenance becomes easier and machine contamination is prevented, but the device complexity increases
Solution Approach 1:
The filter is merged with the cap to form an integrated cap-filter assembly. This combination simplifies the overall structure by eliminating the need for separate filter housing and mounting mechanisms, while still achieving easy removable access for maintenance. The integration reduces the number of separate components and assembly steps.
Solution Approach 2:
Instead of making the filter itself removable from a fixed housing, the invention inverts the approach by making the entire cap (which contains the filter) removable. This inversion simplifies the design by allowing the filter to remain permanently mounted within the cap, eliminating complex filter retention mechanisms while achieving the same maintenance accessibility goal.
3Ease of operation
If suction cups are made adjustable for better sheet handling, then sheet tightening improves, but the device complexity increases
Solution Approach 1:
The suction cups are made dynamically adjustable rather than fixed. The ability to adjust the position and orientation of suction cups allows optimal adaptation to different sheet sizes and positions, improving sheet handling and tightening. This dynamic adjustability is achieved through simple mechanical means that do not overly complicate the device.
Solution Approach 2:
The adjustable suction cup design provides multi-functionality, allowing the same suction cup mechanism to handle various sheet sizes, positions, and orientations. This universality is achieved through adjustable positioning that can accommodate different operational requirements without requiring multiple specialized components, thus improving ease of operation without proportionally increasing complexity.
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 design allows for external cleaning and replacement of filters, preventing machine soiling and enhancing maintenance efficiency, while also enabling adjustable suction for better sheet handling and potential recyclability of disposable parts.
Implementation Method 1
a suction cup (3) which serves to hold a printed sheet (18) on a drum surface (1)
Implementation Method 2
a filter (8) which serves to prevent paper dust drawn in by the suction opening (6) from entering the vacuum system
Implementation Method 3
Pipe 4 acts as a suction air duct, through which the suction opening 6 is connected to a vacuum generator
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A device for pneumatically holding sheets of printing material comprises a series of suction cups, each associated with a filter (8). The suction cups each have a replaceable cap (5) in which the filter (8) is housed, so that the filter (8) together with the cap (5) can be replaced.