Arrangement for continuously determining the density of a web of fiber sliver

US4646387A · kind A · utility

Assignee

• Maschinenfabrik Rieter AG · CH

Inventors

• Peter Oswald · Bernhaupten, DE
• Victor Pietrini · Wiezikon, CH

Key dates

• Filing date: Feb 14, 1986
• Grant date: Mar 3, 1987
• Expiry date: Feb 14, 2006

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D01H5/38
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

An arrangement for continuously determining the density of an elongated strip-shaped web of fiber sliver in the course of a spinning process in order to generate control signals for use in controlling the operation of machine elements operative for equalizing the distribution of the fiber sliver includes two of stepped rollers which together delimit, at a their nip region, a confining space for the passage of the fiber sliver web therethrough. One of the rollers is mounted on a support for rotation about a stationary axis and is driven in rotation, while the other roller is mounted on the support for free rotation about another axis which is parallel to the stationary axis and defines an imaginary plane therewith, as well as for movement along the imaginary plane against a spring force away from the one roller, so that the fiber sliver is compressed and moves the other roller to a greater or lesser degree away from the one roller as it passes through the confining space, depending on its density. A contactless proximity sensing element is arranged along the imaginary plane and has a sensing surface which faces a portion of the peripheral surface of the other roller so as to detect …