Method and apparatus for guiding a corrugated fibreboard web
AssigneeRengo Co., Ltd.
InventorMasateru Tokuno
Life of this patent
Estimating the term…
Abstract
A method and an apparatus for guiding a corrugated fibreboard web in which the edges of a running web are detected and followed by a pair of sensors and a pair of web guides are controlled to move according to the width of the web to positions at an equal distance from a certain reference line, e.g. the machine center.
Claims10
A web guide systm for guiding a corrugated fibreboard web on a corrugating machine to prevent it from running out of true, said system comprising:
- a pair of web guides movably mounted at the sides of said corrugating machine for movement transversely of the path of the web through said machine for guiding the edges of the running web,
- a sensing means disposed upstream of said web guides and having at least one pair of sensors movable transversely for detecting and following the edges of the running web, and
- a guide moving means responsive to the signal from said sensing means for moving said web guides transversely so that the distance between said web guides will be substantially equal to the width of the running web.
A method for guiding a corrugated fibreboard web on a corrugating machine while the web is running, comprising detecting the edges of said running web by a pair of sensors, and controlling a pair of web guides according to the output from said sensors so that the distance between said web guides will be substantially equal to the width of said running web, detecting the approach of a wider web than that at said web guides at a point upstream of said web guides, and moving said web guides outwardly out of way of said wider web in response to the detection of said approach and then further moving said web guides to appropriate positions for the wider width of the running web.
Dependencies are inferred from the claim text.