Interference Bracket Mechanism for Interleaved Sheet Pack Formation
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Solution Overview
Problem
Existing machinery for forming numbered packs of interleaved sheets faces inefficiencies in starting new pack formation due to the need for separation brackets to reposition, leading to increased costs and sheet quality deterioration, and limits flexibility in sheet format changes.
Innovation Solution
A machine with counter-rotating folding rollers and interference surfaces that move tangentially to intercept sheets, allowing for optimized bracket paths and eliminating the need for toroidal grooves on the rollers, enabling faster cycle times and adaptable format changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If toroidal grooves are provided on the folding roller to enable insertion of separation brackets, then the brackets can be positioned in immediate proximity of the roller surface, but this represents a significant increase in cost and deterioration in sheet quality
Solution Approach 1:
The invention divides the separation function into two independent components: the folding roller maintains its simple cylindrical shape while the separation brackets are mounted on a mobile carriage that can be positioned independently. This segmentation allows the brackets to be separated from the roller surface, eliminating the need for grooves and preserving sheet quality while still enabling timely intervention in the pack formation cycle.
Solution Approach 2:
The mobile carriage acts as an intermediary mechanism between the folding roller and the separation brackets. It provides the necessary positioning and movement capability for the brackets without requiring modifications to the roller itself. The carriage system mediates the interaction, allowing brackets to approach the roller surface closely enough to perform separation while maintaining roller surface integrity.
2Adaptability or versatility
If the folding roller diameter is fixed to determine sheet format, then the roller design is simplified, but this limits the ability to change sheet formats without intervention on roller geometry
Solution Approach 1:
The invention introduces dynamic adjustability to the separation bracket system through the mobile carriage, which can be repositioned along the roller circumference. This dynamic positioning capability allows the same roller to work with different sheet formats by adjusting bracket positions rather than changing roller geometry, thereby increasing adaptability without increasing device complexity.
3Productivity
If separation brackets move along a rectilinear path, then the mechanism is simple, but this increases the time required for brackets to return to starting position and reduces productivity
Solution Approach 1:
The mobile carriage system enables curved or optimized paths for the separation brackets during their movement cycle. Instead of strictly rectilinear motion, the brackets can follow more efficient trajectories that reduce return time while maintaining synchronization with the roller rotation, thereby increasing productivity without excessive complexity.
Data Source
AI summary
A machine for the formation of numbered packs of interleaved sheets of paper (6), includes a pair of counter-rotating motor-driven folding rollers (2, 3), an interference surface (11) mobile with a to-and-fro motion between a position (P1) of non-interference and a position (P2) of interference, and a mechanism (36) of cyclic movement of the surface (11) including at least one supporting crank (13) oscillating with respect to the carriage (26) and articulated to a first axis (15) of rotation of the surface, and a first motor-driven connecting rod (19) kinematically connected to the surface (11) to bestow the to-and-fro motion thereon.