Multi-rail Carriage Assembly for Adjustable Knife Positioning
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Solution Overview
Problem
Existing score slitting machines require long setup times for manual positioning of knives and have limitations in achieving narrow slit widths due to the fixed spacing of knife holders, which is insufficient for various converting applications.
Innovation Solution
A multi-rail carriage assembly with adjustable carriers that can be positioned using a linear actuator and positioner system, allowing for precise placement of knife holders on a dovetail mounting system, and an electronically controlled air manifold for automated slit width control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual positioning of knives on support bar is used, then knife placement flexibility is improved, but setup time increases significantly
Solution Approach 1:
The patent replaces the manual mechanical positioning system with an automated positioning system that uses a computer-controlled carriage assembly. The system automatically positions multiple knife holders along the support bar using programmed coordinates, eliminating manual adjustment and significantly reducing setup time while maintaining placement precision.
Solution Approach 2:
The patent implements preliminary action by pre-programming the positions of multiple knife holders before the actual slitting operation. The carriage assembly is pre-configured with the exact positions and orientations of all knife holders, allowing the system to automatically execute the positioning without manual intervention during setup.
2Ease of manufacture
If fixed spacing of knife holders on support bar is used, then manufacturing simplicity is improved, but minimum slit width is limited
Solution Approach 1:
The patent transforms the static fixed-spacing knife holder arrangement into a dynamic adjustable system. The carriage assembly can move along the support bar to reposition knife holders to any predetermined location within the working width, allowing the minimum slit width to be adjusted based on specific application requirements while maintaining manufacturing simplicity through standardized mounting features.
Solution Approach 2:
The patent segments the support bar into multiple discrete positioning locations where knife holders can be independently positioned. Each knife holder can be placed at specific predetermined positions along the support bar, allowing flexible configuration of slit widths by selecting different combinations of positioned knife holders.
Data Source
AI summary
A system for slitting a web includes a carriage assembly having an elongate housing including a first wall, where the first wall defining a longitudinal axis. A first plurality of rails can be mounted on the first wall, wherein the plurality of rails extends parallel to the longitudinal axis. At least one of the plurality of rails can have a substantially circular cross section, among others. The system also includes a first plurality of carriers. Each carrier can be adapted and configured to support an instrumentality such as a blade for performing an operation (e.g., cutting) on a web of material. The carrier body includes a first body portion and a second body portion. Each of body portion includes at least one mounting feature for mounting the carrier on a the plurality of rails.