GB1280666A - Apparatus for determining the fraction or percent moisture removed from a traveling material - Google Patents

Apparatus for determining the fraction or percent moisture removed from a traveling material

Info

Publication number
GB1280666A
GB1280666A GB40555/69A GB4055569A GB1280666A GB 1280666 A GB1280666 A GB 1280666A GB 40555/69 A GB40555/69 A GB 40555/69A GB 4055569 A GB4055569 A GB 4055569A GB 1280666 A GB1280666 A GB 1280666A
Authority
GB
United Kingdom
Prior art keywords
moisture
per unit
unit area
web
percentage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB40555/69A
Inventor
Henry Roy Chope
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Industrial Nucleonics Corp
Original Assignee
Industrial Nucleonics Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Industrial Nucleonics Corp filed Critical Industrial Nucleonics Corp
Publication of GB1280666A publication Critical patent/GB1280666A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
    • G01G19/64—Percentage-indicating weighing apparatus, i.e. for expressing the weight as a percentage of a predetermined or initial weight
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
    • G01G19/40—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups with provisions for indicating, recording, or computing price or other quantities dependent on the weight
    • G01G19/413—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups with provisions for indicating, recording, or computing price or other quantities dependent on the weight using electromechanical or electronic computing means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
    • G01G19/40—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups with provisions for indicating, recording, or computing price or other quantities dependent on the weight
    • G01G19/413—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups with provisions for indicating, recording, or computing price or other quantities dependent on the weight using electromechanical or electronic computing means
    • G01G19/414—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups with provisions for indicating, recording, or computing price or other quantities dependent on the weight using electromechanical or electronic computing means using electronic computing means only
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
    • G01N5/04—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by removing a component, e.g. by evaporation, and weighing the remainder
    • G01N5/045—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by removing a component, e.g. by evaporation, and weighing the remainder for determining moisture content
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06G—ANALOGUE COMPUTERS
    • G06G7/00—Devices in which the computing operation is performed by varying electric or magnetic quantities
    • G06G7/12—Arrangements for performing computing operations, e.g. operational amplifiers
    • G06G7/16—Arrangements for performing computing operations, e.g. operational amplifiers for multiplication or division
    • G06G7/163—Arrangements for performing computing operations, e.g. operational amplifiers for multiplication or division using a variable impedance controlled by one of the input signals, variable amplification or transfer function
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/04—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements with semiconductor devices only
    • H03F3/14—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements with semiconductor devices only with amplifying devices having more than three electrodes or more than two PN junctions
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S162/00—Paper making and fiber liberation
    • Y10S162/06—Moisture and basic weight

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Theoretical Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Computer Hardware Design (AREA)
  • Software Systems (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

1280666 Determination of moisture content and removal INDUSTRIAL NUCLEONICS CORP 13 Aug 1969 [13 Aug 1968] 40555/69 Heading G1A In the investigation of moisture removal from a travelling web, the mass per unit area of the web is measured at a first point before drying and at a second point downstream of the drying station, at which point the moisture content of the web is also measured. Signals representing these three quantities are operated on by arithmetical processing means to develop signals representing the actual moisture content at the first point, and the percentage, and the actual moisture weight per unit area removed between the two points. The invention is described with reference to a conventional Fourdrinier paper making process comprising elements 10 which include dryer sections 26-30. A conventional moisture gauge cannot accurately be used at the "wet end", I, and so only a beta-ray gauge 47 measuring mass per unit area of the paper web is used at this first point. At the "dry end", II, a similar beta-ray gauge 45 measuring mass per unit area is associated with a moisture gauge developing e.g. the percentage moisture content. The gauges scan across the web in synchronism. The dry end measurements, BW 2 and m 2 are multiplied at 53 to obtain the dry end moisture weight per unit area M 2 . This is fed with the wet end measurement BW 1 and the inverted BW 2 to adder 54 to develop M 1 , the weight per unit area of moisture at wet end I. This is indicated at 58 and also used to obtain the percentage wet end moisture, indicated at 66, by means of a divider, which also receives BW 1 -BW 2 (from adder 62) which is also indicated as the weight per unit area of moisture removed at 64. Modifications of the Fig.1 arrangement include the use of a two input adder, instead of 54, which receives M 2 and the difference output from 62. Fig.2 (not shown) details a circuit arrangement using a two-input adder instead of 54. The gauges 45 and 47 for this arrangement provide mechanical outputs controlling the settings of potentiometers in bridge circuits in accordance with the mass per unit area variations. The bridges are adjustable so that their output voltages have an equal proportionality relationship to the web variations. The voltage representing BW 2 is fed to a multiplier comprising an operational amplifier having a feedback resistor arrangement variable in steps of 10 kilohms or continuously in dependence on the percentage moisture measured by gauge 49. The output is fed to an adder with a further input representing BW 1 which takes the form of a second operational amplifier. The signal M 1 obtained is then used as in Fig.1 to obtain the percentage moisture removed.
GB40555/69A 1968-08-13 1969-08-13 Apparatus for determining the fraction or percent moisture removed from a traveling material Expired GB1280666A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US75239468A 1968-08-13 1968-08-13

Publications (1)

Publication Number Publication Date
GB1280666A true GB1280666A (en) 1972-07-05

Family

ID=25026137

Family Applications (1)

Application Number Title Priority Date Filing Date
GB40555/69A Expired GB1280666A (en) 1968-08-13 1969-08-13 Apparatus for determining the fraction or percent moisture removed from a traveling material

Country Status (3)

Country Link
US (1) US3564224A (en)
CA (1) CA930859A (en)
GB (1) GB1280666A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3930934A (en) * 1972-03-08 1976-01-06 Industrial Nucleonics Corporation Speed optimization control for fibrous sheet making machines such as paper making machines with dryer limited conditions
US3777127A (en) * 1972-04-17 1973-12-04 Celanese Corp Analyzer apparatus and method
USRE32861E (en) * 1973-07-20 1989-02-07 Cem Corporation Automatic volatility computer
US4056714A (en) * 1974-08-08 1977-11-01 Measurex Corporation Method for control of ceiling tile process
US4316384A (en) * 1979-09-04 1982-02-23 General Mills, Inc. Digital moisture meter and method for determining percent weight loss
US5020356A (en) * 1989-08-25 1991-06-04 Process Automation Business, Inc. Method and apparatus for measuring characteristics of a multilayer product
US5211252A (en) * 1992-02-18 1993-05-18 R. J. Reynolds Tobacco Company Automatic basis sheet weight and moisture content measuring apparatus

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3073153A (en) * 1960-01-19 1963-01-15 Alger L Petitjean Moisture measuring system
US3260642A (en) * 1962-12-12 1966-07-12 Industrial Nucleonics Corp Moisture computer and control system for processing materials having high, indeterminate moisture contents

Also Published As

Publication number Publication date
CA930859A (en) 1973-07-24
US3564224A (en) 1971-02-16

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees