UST940004I4 - Laminar flow device for calibrating a tobacco smoke filter rcd pressure drop testing apparatus and method for making device - Google Patents

Laminar flow device for calibrating a tobacco smoke filter rcd pressure drop testing apparatus and method for making device Download PDF

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Publication number
UST940004I4
UST940004I4 US43881774A UST940004I4 US T940004 I4 UST940004 I4 US T940004I4 US 43881774 A US43881774 A US 43881774A US T940004 I4 UST940004 I4 US T940004I4
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United States
Prior art keywords
calibrating
pressure drop
laminar flow
rcd
tobacco smoke
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Priority to US43881774 priority Critical patent/UST940004I4/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24C—MACHINES FOR MAKING CIGARS OR CIGARETTES
    • A24C5/00—Making cigarettes; Making tipping materials for, or attaching filters or mouthpieces to, cigars or cigarettes
    • A24C5/32—Separating, ordering, counting or examining cigarettes; Regulating the feeding of tobacco according to rod or cigarette condition
    • A24C5/34—Examining cigarettes or the rod, e.g. for regulating the feeding of tobacco; Removing defective cigarettes
    • A24C5/3418—Examining cigarettes or the rod, e.g. for regulating the feeding of tobacco; Removing defective cigarettes by pneumatic means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/007—Leak detector calibration, standard leaks

Definitions

  • the device is a small cylindrical rod having Within and spaced around its periphery a plurality of grooves extending axially along its length.
  • the grooves are of constant depth and the cross-sectional area of each groove is small enough to promote laminar flow of a fluid medium through the groove.
  • the open side of each groove is covered by a cylindrical sleeve having an interference fit over the length of the cylindrical rod and being slidably adjustable to cover or uncover a predetermined length of the grooves for determining different pressure drops at predetermined fluid flow rates.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
  • Manufacturing Of Cigar And Cigarette Tobacco (AREA)
  • Control Of Fluid Pressure (AREA)

Abstract

NO ABSTRACT AVAILABLE IN THE IFI DATABASE FOR THIS PATENT

Description

DEFENSIVE PUBLICATION UNITED STATES PATENT AND TRADEMARK OFFICE Published at the request of the applicant or owner in accordance with the Notice of Dec. 16, 1969, 869 0.G. 687. The abstracts of Defensive Publication applications are identified by distinctly numbered series and arearranged chronologically. The-heading of each abstract indicates the number of pages of specification, including claims and sheets of drawings contained in the application as originally filed. The files of these applications are available to the public for inspection and reproduction may be purchased for 30 cents a sheet.
Defensive Publication applicationshave not been examined as to the merits of alleged invention. The Patent and Trademark Oflice makes no assertion as to the novelty of the disclosed subject matter.
PUBLISHED NOVEMBER 4, 1975 LAMINAR FLOW DEVICE FOR CALIBRATING A TOBACCO SMOKE FILTER ROD PRESSURE DROP TESTING APPARATUS AND METHOD FOR MAKING DEVICE Ronald L. Dixon, Rte. 9, 316 Thistlewood Drive, Kingsport, Tenn. 37663 Filed Feb. 1, 1974, Ser. No. 438,817 Int. Cl. G01f 25/00, FlSd 1/02 U.S. Cl. 73-3 1 Sheet Drawing. 10 Pages Specification A laminar flow device for calibrating a tobacco smoke filter rod pressure drop testing apparatus, and the method of making such device. The device is a small cylindrical rod having Within and spaced around its periphery a plurality of grooves extending axially along its length. The grooves are of constant depth and the cross-sectional area of each groove is small enough to promote laminar flow of a fluid medium through the groove. The open side of each groove is covered by a cylindrical sleeve having an interference fit over the length of the cylindrical rod and being slidably adjustable to cover or uncover a predetermined length of the grooves for determining different pressure drops at predetermined fluid flow rates.
Nov. 4, 1975 CALIBRATING A TOBACCO SMOKE FILTER RCD PRESSURE DROP APPARATUS AND METHOD FOR MAKING DEVICE Original Filed Feb. 1, 19 74 PRESSURE DROP APPARATUS IO)? i m CAMBRIDGE NEEDLE I WATER VALVE 5 Hum MANOMETER E g VACUUM SURGE EIQIXIDPIERE PUMP FLASK ROTAMETER// //SP!ROMETER| 1 600 ML.
T940,()04 FOR TESTING I INDgc D PRESSURE CHANGE APPARATUS i H NEEDLE VALVE*2/ SURGE FLASK MERCURY MANOMETER
US43881774 1974-02-01 1974-02-01 Laminar flow device for calibrating a tobacco smoke filter rcd pressure drop testing apparatus and method for making device Pending UST940004I4 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US43881774 UST940004I4 (en) 1974-02-01 1974-02-01 Laminar flow device for calibrating a tobacco smoke filter rcd pressure drop testing apparatus and method for making device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US43881774 UST940004I4 (en) 1974-02-01 1974-02-01 Laminar flow device for calibrating a tobacco smoke filter rcd pressure drop testing apparatus and method for making device

Publications (1)

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UST940004I4 true UST940004I4 (en) 1975-11-04

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US43881774 Pending UST940004I4 (en) 1974-02-01 1974-02-01 Laminar flow device for calibrating a tobacco smoke filter rcd pressure drop testing apparatus and method for making device

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001097639A1 (en) * 2000-06-20 2001-12-27 Molins Plc Check rod
US11408795B2 (en) * 2018-05-10 2022-08-09 Fukuda Co., Ltd. Sealability evaluation method and the like and standard artificial leak device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001097639A1 (en) * 2000-06-20 2001-12-27 Molins Plc Check rod
US20040025562A1 (en) * 2000-06-20 2004-02-12 Hodge Oliver Daniel Check rod
US6851295B2 (en) * 2000-06-20 2005-02-08 Molins, Plc Check rod
US11408795B2 (en) * 2018-05-10 2022-08-09 Fukuda Co., Ltd. Sealability evaluation method and the like and standard artificial leak device

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