EP0075782A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Method and apparatus for controlling a product which is influenced by a metering process
Assignee: Helleur Donald Edmund
•
Filing: 1982-09-14
•
Granted: —
•
Expires: 2002-09-14
Abstract
Abstract The present invention teaches a method and apparatus for controlling the size of an opening through which material is metered by directing energy in the form of a magnetic field at an element which forms an integral part of the metering device, the element movable relative to another member. The method and apparatus can be utilized for controlling a desired physical property of a product which is dependent on the metering operation, such properties as basis weight, caliper, density, bulk, reel hardness, gloss, smoothness, and opacity, of interest in the paper, plastics and coating fields.
Inventors
- 👤 Donald Edmund Helleur
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 21:59
CPC Classifications
D; D21; D21F; D21F7/00; D21F7/06; B; B29; B29C; B29C48/00; B29C48/03; B29C48/07; B29C48/08; B29C48/09; B29C48/25; B29C48/30; B29C48/305; B29C48/31; B29C48/313; B29C48/92; D21F1/00; D21F1/02; D21F1/028; B29C2948/00; B29C2948/92; B29C2948/92504; B29C2948/92609; B29C2948/92819; B29C2948/92857; B29C2948/92904
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
82 words
Apparatus for controlling the size of an opening through which material is metered, said opening defined by at least first and second members spaced apart from each other, at least one of the members movable toward or away from the other member to change the size of the opening, means for generating a magnetic field, said magnetic field generating means associated with the one member to cause its movement relative to the other member when the magnetic field generating means is operated.
Claim 2
Dependent Claim
82 words
Apparatus for controlling the size of an opening through which material is metered, said opening defined by at least first and second members spaced apart from each other, at least one of the members movable toward or away from the other member to change the size of the opening, means for generating a magnetic field, said magnetic field generating means associated with the one member to cause its movement relative to the other member when the magnetic field generating means is operated.
Claim 3
Dependent Claim
39 words
The apparatus of claim 1 including a heat-expandable member fixed between the movable member and a fixed base, the magnetic field generating means being positioned such that the magnetic flux generated by said field will heat said expandable member.
Claim 4
Dependent Claim
23 words
The apparatus of claim 2 wherein the magnetic field generating means is positioned to surround at least a portion of said heat-expandable means.
Claim 5
Dependent Claim
67 words
The apparatus of claim 2 wherein said magnetic field generating means includes an induction coil having a magnetic core, said magnetic core being operatively connected to said heat-expandable member whereby magnetic flux generated by said magnetic field is conducted from the magnetic core to said heat-expandable member so as to heat said heat-expandable member, said heat-expandable member having a higher resistivity and permeability than said magnetic core.
Claim 6
Dependent Claim
47 words
The apparatus of claim 2 wherein said magnetic field generating means includes a coil surrounding a closed loop magnetic core, an electrical conductor forming at least one loop around said core, said conductor being electrically connected to said heat expandable member which has a relatively high resistivity.
Claim 7
Dependent Claim
119 words
6, An apparatus for controlling a desired physical property of a product of one of the manufacturing operations includes the metering of at least one component of the product through an orifice defined by at least first and second members spaced apart from each other, at least one of the members movable toward or away from the other member to change the size of the opening, means for generating a magnetic field, said magnetic field generating means associated with the one member to cause its movement relative to the other when the magnetic field generating means is operated to change the size, orientation and profile of the orifice and thereby change the value and profile of the desired property.
Claim 8
Dependent Claim
119 words
6, An apparatus for controlling a desired physical property of a product of one of the manufacturing operations includes the metering of at least one component of the product through an orifice defined by at least first and second members spaced apart from each other, at least one of the members movable toward or away from the other member to change the size of the opening, means for generating a magnetic field, said magnetic field generating means associated with the one member to cause its movement relative to the other when the magnetic field generating means is operated to change the size, orientation and profile of the orifice and thereby change the value and profile of the desired property.
Claim 9
Independent Claim
101 words
The method for use in controlling the size of an opening through which material is metered and wherein at least part of said opening is defined by a movable edge, the method comprising the steps of associating a heat-expandable member with said movable edge, such that an expansion of the member will move the edge, positioning the magnetic field generating means such that a magnetic flux generated by said magnetic field generating means will heat said expandable means, and selectively operating the generating means to heat the expandable member to move the edge to thereby control the size of the opening.
Claim 10
Independent Claim
101 words
The method for use in controlling the size of an opening through which material is metered and wherein at least part of said opening is defined by a movable edge, the method comprising the steps of associating a heat-expandable member with said movable edge, such that an expansion of the member will move the edge, positioning the magnetic field generating means such that a magnetic flux generated by said magnetic field generating means will heat said expandable means, and selectively operating the generating means to heat the expandable member to move the edge to thereby control the size of the opening.
Claim 11
Dependent Claim
24 words
The method of claim 7 further including the step of placing a heat expandable member fixed between the movable member and a fixed base.
Claim 12
Dependent Claim
36 words
The method of claim 8 including the step of positioning the magnetic field generating means about a magnetic core and connecting said magnetic core to said expandable member to close the magnetic circuit of said core.
Claim 13
Dependent Claim
65 words
10, The method of claim 8 further including the step of placing said magnetic field generating means about a closed loop magnetic core, placing an electrical conductor of low resistivity in electrical contact with said heat-expandable means, having a higher resistivity such that the conductor forms at least one loop about said magnetic core, and said conductor and heat-expandable means forms a closed electrical circuit.
Claim 14
Independent Claim
107 words
A method for controlling a desired physical property of a product where one of the manufacturing operations includes a metering of at least one component of the product through an opening defined by a movable edge, the method comprising heat-expandable means associated with the edge to thereby move the edge, positioning a magnetic field generating means such that the magnetic flux generated by said field will heat said expandable means, and selectively operating said generating means to heat the expandable means to move the edge to control the size, orientation and profile of said opening and thereby change the average value and profile of the desired property.
Claim 15
Independent Claim
107 words
A method for controlling a desired physical property of a product where one of the manufacturing operations includes a metering of at least one component of the product through an opening defined by a movable edge, the method comprising heat-expandable means associated with the edge to thereby move the edge, positioning a magnetic field generating means such that the magnetic flux generated by said field will heat said expandable means, and selectively operating said generating means to heat the expandable means to move the edge to control the size, orientation and profile of said opening and thereby change the average value and profile of the desired property.
Claim 16
Dependent Claim
41 words
The method of claim 11 wherein the operation involves the metering of paper-making stock and the opening includes upper and lower lips of the slice and where the edge of at least one of said slice lips is said movable edge.
Claim 17
Dependent Claim
38 words
The method of claim 12 wherein said expandable means includes a plurality of rods wherein each rod is associated with a particular edge of said slice, each of said rods has a magnetic field generating means associated therewith.
Claim 18
Independent Claim
77 words
A method of converting a manually operated paper- making slice lip operation wherein the slice lips are controlled by manually operable control rods of a heat-expandable material, comprising the steps of placing magnetic field generating means in association with said control rods such that magnetic flux generated by said field will heat said control rods, and selectively operating the generating means to heat the control rods to move the edge to control the size of the opening.
Claim 19
Independent Claim
77 words
A method of converting a manually operated paper- making slice lip operation wherein the slice lips are controlled by manually operable control rods of a heat-expandable material, comprising the steps of placing magnetic field generating means in association with said control rods such that magnetic flux generated by said field will heat said control rods, and selectively operating the generating means to heat the control rods to move the edge to control the size of the opening.
Claim 20
Dependent Claim
64 words
In a paper-making stock delivery system including upper and lower slice elements defining a slice and including rods adapted to adjust at least one of said slice lips, the improvement comprising at least one coil associated with one of said rods for generating a magnetic field to cause said one rod to move to thereby deform the one slice lip and adjust the slice.
Claim 21
Dependent Claim
64 words
In a paper-making stock delivery system including upper and lower slice elements defining a slice and including rods adapted to adjust at least one of said slice lips, the improvement comprising at least one coil associated with one of said rods for generating a magnetic field to cause said one rod to move to thereby deform the one slice lip and adjust the slice.
Claim 22
Dependent Claim
16 words
The method of claim 11 wherein the operation involves the coating of a web of material.
Claim 23
Dependent Claim
17 words
The method of claim 11 wherein the operation involves the extrusion of a material through a die.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.