Suction Roller with Movable Feelers for Interfolding
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Solution Overview
Problem
Existing suction rollers for interfolding units are complex and require intricate pneumatic valves, making them inefficient and difficult to adapt to changes in sheet formats.
Innovation Solution
A suction roller design featuring a permanent suction source with an outer hollow roller and angularly spaced bores, utilizing intermediate suction chambers and radially movable feelers with thrust springs to selectively communicate with the suction source, allowing for simplified construction and flexible operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex pneumatic valves are used in the suction roller, then suction control is achieved, but device complexity increases
Solution Approach 1:
The patent extracts and eliminates the complex pneumatic valve system from the suction roller design. Instead of using traditional pneumatic valves to control suction, the invention uses a simplified structure where the suction roller directly creates negative pressure through its rotation and internal chamber design, removing the need for intermediate valve components while maintaining effective suction control
Solution Approach 2:
The suction roller is designed to automatically regulate its own suction function through its structural design. The roller's internal chambers and openings are configured to create negative pressure zones that naturally control sheet adhesion and release without requiring external pneumatic valve control systems, making the system self-regulating
2Ease of manufacture
If fixed bore arrangements are used in the suction roller, then construction is simplified, but adaptability to different sheet formats is reduced
Solution Approach 1:
The patent implements a dynamic bore arrangement system where the suction roller can adjust the positioning and configuration of its bores based on different sheet formats. The roller includes adjustable components that allow operators to reposition bores or change their activation patterns, enabling the same roller structure to adapt to various sheet sizes and types while maintaining ease of manufacture through modular design elements
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
Enables reliable and adaptable suction control, allowing for easy selection of bore arrangements and format changes, enhancing operational efficiency and flexibility in interfolding processes.
Implementation Method 1
a permanent suction source (2) comprising the inner cavity of an inner hollow cylinder (1) provided with radial bores (16)
Implementation Method 2
a longitudinal distribution of movable feelers (5) mounted internally to the outer roller (3) and provided, in turn, with a radial bore (9) communicating externally with a corresponding intermediate chamber (7) and an opening (10) capable of sealingly slide on the cylindrical surface of a respective sleeve (6)
Data Source
Figure 1b~1d
Figure 1b~1d
Figure 2~3
AI summary
Suction roller structure for the pneumatic transport of sheets in an interfolding unit (U), comprising a suction source (2) comprising an inner cavity of an inner hollow cylinder (1) and an outer roller (3) provided with longitudinal rows of bores (4) angularly spaced and selectively communicating with said suction source during the angular rotation of the roller (3) with respect to the cylinder (1).