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Sharpening System for the knives of an agricultural cutter

IP.com Disclosure Number: IPCOM000178120D
Publication Date: 2009-Jan-16
Document File: 4 page(s) / 25K

Publishing Venue

The IP.com Prior Art Database

Abstract

In a cutting system stationary knives are provided, whereas fingers or carriers rotate through the spaces between adjacent knives. Sharpening elements are attached to the lateral surfaces of the rotating fingers, such, that they grind the knives, once they get in contact. Contact is achieved by moving either the rotating fingers or the knives laterally.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 100% of the total text.

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SHARPENING PRECUTTER KNIVES

For each knife a grinder stone is attached on the side of one of the corresponding precutter teeth

From one knife to the next the stone can have an angular offset , so the knives are grinded alternatively

The assembly supporting the knives is moved sideways slightly to bring the knives in contact with the stones
This movement is given by a cam and is possibly spring loaded

The knives are placed in a particular position during the sharpening phase

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The stone active surface has an helical shape, so the contact line is progressing along the knife edge

The assembly supporting the knives is moved sideways slightly to bring the knives in contact with the stones
This movement is given by a cam and is possibly spring loaded

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The knife lateral position is linked with the angular position of the rotor to progressively grind from the engaging point to the escapement point

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