US 5,169,500 A · Adjustable angle foil for paper making machine with rigid foil body and cam actuation means

Abstract

An adjustable angle foil apparatus for a paper making machine is described in which a rigid foil member is pivoted by a cam actuated adjustment mechanism to change the foil angle. The cam actuator includes at least a rear set of cam slots and cam follower pins connecting a foil support member to a foil mounting base member to pivot support member in response to longitudinal movement thereof for adjustment of the foil angle. A rigid foil body made of foil segments of ceramic or other hard, wear resistant material, are attached by tongue and groove connections and bonding adhesive to the foil support member. The cam actuated adjustment mechanism pivots such support member to adjust the foil angle without bending the foil. In one embodiment a front set of cam slots and cam follower pins is provided to maintain the height of the leading edge of the foil substantially constant at different foil angles. In a second embodiment the ends of the pins are connected to cam slide rods which extend across the pins and fit into the cam slots. In a third embodiment, the front set of cam slots and pins is replaced by a pivot rod attached to the front of the mounting base member about which the foil and foil support member pivot in response to the rear cam actuator adjustment of the foil angle.

Claims20

Dependent claims

Drainage foil apparatus with adjustable foil angle for a papermaking machine, comprising:

foil means for removing water from paper pulp stock carried by a conveyor across said foil means, said foil means including a rigid foil member having a foil leading portion rigidly connected to a foil trailing portion and an upper surface of the foil member comprising a hard wear resistant material;
non-resilient mounting means for mounting said rigid foil member on a mounting base member structured to enable pivoting of said foil member while maintaining the height of the foil leading portion substantially constant;
foil angle adjustment means for adjusting the foil angle between said foil trailing portion and said conveyor, said foil angle adjustment means including a cam actuation means having a first set of cam slots and cam follower projections within said cam slots, said first set being spaced along the rear of the mounting base member extending beneath said foil member, and said foil member being mounted on said base member by said cam slots and projections so that longitudinal movement of said foil member relative to said base member causes said foil member to pivot and thereby change said foil angle;
and
control means for longitudinally moving said foil member relative to said mounting base member by a predetermined amount to adjust said foil angle.

2 more elements

Drainage foil apparatus with adjustable foil angle for a papermaking machine, comprising:

foil means for removing water from paper pulp stock carried by a conveyor across said foil means, said foil means including a rigid foil member having a foil leading portion rigidly connected to a foil trailing portion and an upper surface of the foil member comprising a hard wear resistant material;
non-resilient mounting means for mounting said rigid foil member on a mounting base member structured to enable pivoting of said foil member while maintaining the height of the foil leading portion substantially constant;
foil angle adjustment means for adjusting the foil angle between said foil trailing portion and said conveyor, said foil angle adjustment means including a cam actuation means having a first set of cam slots and cam follower projections within said cam slots, said first set being spaced along the rear of the mounting base member extending beneath said foil member, and said foil member being mounted on said base member by said cam slots and projections so that longitudinal movement of said foil member relative to said base member causes said foil member to pivot and thereby change said foil angle without bending said foil member;
and
control means including a rotary control shaft, for longitudinally moving said foil member relative to said mounting base member by a predetermined amount to adjust said foil angle in response to rotation of said control shaft.

2 more elements

Dependencies are inferred from the claim text.

Adjustable angle foil for paper making machine with rigid foil body and cam actuation means

Life of this patent

Adjustable angle foil for paper making machine with rigid foil body and cam actuation means

Life of this patent

Abstract

Claims20