Low velocity trim removal means and method
AssigneeBeloit Corporation
InventorKenneth G. Frye
Life of this patent
Estimating the term…
Abstract
A means and method for handling trim strip slit from the margin of a travelling web, comprising rotary means by which biasing forces is applied to the strip away from the slitter into the chute. Within the chute relatively low velocity means advance the trim strip in a foldably bunched condition toward the bottom of the chute where the bunched trim strip is then transported away from the chute. Low velocity air, as well as rotary members are provided in the chute for effecting the foldable bunching and advancing of the trim strip. Either or both of low velocity air and mechanical conveying apparatus may be provided for transporting the trim strip away from the bottom of the chute.
Claims34
In combination with a slitter for marginally trimming a strip of material from a travelling web, and a trim chute extending angularly away from the slitter for receiving the trim strip:
- rotary means cooperatively related to said slitter for receiving the trim strip therebetween and turning and biasing the trim strip from the slitter into the chute at substantially the speed of travel of said web;
- and means in said chute for advancing the trim strip in the chute at a relatively lower velocity than said speed of travel;
- said rotary means comprising annular drum surfaces spaced apart sufficiently to avoid nipping the trim strip but close enough for applying rotary frictional and air biasing components of force in the direction of travel of the trim strip.
In combination with a slitter for marginally trimming a strip of material from a travelling web, and a trim chute extending angularly away from the slitter for receiving the trim strip:
- rotary means cooperatively related to said slitter for receiving the trim strip therebetween and turning and biasing the trim strip from the slitter into the chute at substantially the speed of travel of said web;
- and means in said chute for advancing the trim strip in the chute at a relatively lower velocity than said speed of travel;
- said rotary means comprising wheels, at least one of which has generally radially extending bristles for engaging and assisting in biasing the trim strip.
In combination with a slitter comprising a slitter blade and a cooperating slitter band for marginally trimming a strip of material from a travelling web, and a trim chute extending angularly away from the slitter for receiving the trim strip:
- rotary means cooperatively related to said slitter for receiving the trim strip therebetween and turning and biasing the trim strip from the slitter into the chute at substantially the speed of travel of said web;
- said rotary means comprising a receiving wheel co-rotative with said slitter band and a trim directing wheel having its periphery in closely spaced relation to the periphery of said receiving wheel and defining a trim strip biasing gap through which the trim strip is biased away from the point of slitting of the web by the blade and the slitter band;
- and means in said chute for advancing the trim strip in the chute at a relatively lower velocity than said speed of travel.
In combination with a slitter for marginally trimming a strip of material from a travelling web, and a trim chute extending angularly downwardly away from the slitter for receiving the trim strip:
- rotary means cooperatively related to said slitter for receiving the trim strip therebetween and turning and biasing the trim strip from the slitter into the chute at substantially the speed of travel of said web;
- means in said chute for advancing the trim strip in the chute at a relatively lower velocity than said speed of travel;
- and means for transporting the trim strip away from below said low velocity means;
- said transporting means comprising low velocity air directing means.
A method of removing from a slitter a marginal strip trimmed from a travelling web, comprising:
- operating rotary members adjacent to the slitter and thereby applying biasing force to the trim strip in a direction away from the slitter and into a trim chute at substantially the speed of travel of said web;
- and relating the surfaces of said rotary members for applying frictional and air biasing components of force to the strip in the direction of travel of the strip without applying possibly tearing pull on the strip.
A method of removing from a slitter a marginal strip trimmed from a travelling web, comprising:
- operating a rotary device adjacent to the slitter and thereby applying biasing force to the trim strip in a direction away from the slitter and into a trim chute at substantially the speed of travel of said web;
- within the trim chute advancing the trim strip at a lower velocity than said speed of travel;
- folding and bunching the trim strip in said chute in the course of advancing the trim strip at said lower velocity;
- and impinging said trim strip with low velocity air for promoting said folding and bunching.
A method of removing trim strip from a travelling web into a trim chute assembly, comprising:
- directing the trim strip from a slitter into the trim chute assembly;
- advancing the trim strip through the trim chute assembly between opposed rotary members located within said chute assembly a substantial distance beyond said slitter;
- and driving said members rotatably at a slower speed than the speed of travel of said web, and thereby promoting bunching of the trim strip within the chute in the space between said slitter and said rotary members.
A method of removing from a slitter a marginal strip trimmed from a travelling web, comprising:
- operating a rotary device adjacent to the slitter and running said trim strip between non-nipping drum surfaces of said rotary device and by means of said drum surfaces applying rotary frictional and air biasing components of force to the trim strip in a direction away from the slitter and into a trim chute at substantially the speed of travel of said web;
- and within the trim chute advancing the trim strip at a lower velocity than said speed of travel.
In a trim chute assembly adapted for receiving and removing trim strip from a travelling web:
- means for directing the trim strip into the chute;
- and opposed cooperating spike rolls located within said chute and operatively driven rotatably with the trim strip therebetween for advancing the strip through the trim chute.
A trim chute for handling marginal strip trimmed from a travelling web, and comprising:
- means for diverting the trim strip into the chute;
- and means within the chute for bunching the trim strip generally foldably and advancing the bunched trim strip through the chute and comprising air nozzle means for directing low velocity air toward and onto the trim strip within the chute.
A method of handling marginal strip trimmed from a travelling web, comprising:
- diverting the trim strip into a chute;
- and within the chute bunching the trim strip generally foldably by impinging low velocity air against the trim strip and advancing the bunched trim strip through the chute.
In combination with a slitter for marginally trimming a strip of material from a travelling web, and a trim chute extending angularly away from the slitter for receiving the trim strip:
- rotary members cooperatively related to said slitter for receiving the trim strip from the slitter and turning and biasing the trim strip from the slitter into the chute at substantially the speed of travel of said web;
- said rotary members having their surfaces related for applying frictional and air biasing components of force in the direction of travel of the trim strip without applying possibly tearing pull on the strip.
In combination with a slitter for marginally trimming a strip of material from a travelling web, and a trim chute extending angularly away from the slitter for receiving the trim strip:
- rotary means cooperatively related to said slitter for receiving the trim strip therebetween and turning and biasing the trim strip from the slitter into the chute at substantially the speed of travel of said web;
- means in said chute for advancing the trim strip in the chute at a relatively lower velocity than said speed of travel;
- said relatively low velocity advancing means comprising rotary members in said chute and spaced a substantial distance from said rotary means for receiving the trim strip therebetween;
- and means for driving said rotary members at a slower speed than the speed of travel of said web for retarding the speed of advance of the trim strip, so that foldable bunching of the trim strip is promoted in the space within said chute between said rotary means and said rotary members.
Dependencies are inferred from the claim text.