GB527851A - Improvements in or relating to air-purifying elements and air-purifying apparatus - Google Patents

Improvements in or relating to air-purifying elements and air-purifying apparatus

Info

Publication number
GB527851A
GB527851A GB12038/39A GB1203839A GB527851A GB 527851 A GB527851 A GB 527851A GB 12038/39 A GB12038/39 A GB 12038/39A GB 1203839 A GB1203839 A GB 1203839A GB 527851 A GB527851 A GB 527851A
Authority
GB
United Kingdom
Prior art keywords
air
folds
sheet
casing
purifying
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
GB12038/39A
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.)
MSA Safety Inc
Original Assignee
Mine Safety Appliances Co
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 Mine Safety Appliances Co filed Critical Mine Safety Appliances Co
Publication of GB527851A publication Critical patent/GB527851A/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D46/00Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/52Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material
    • B01D46/521Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material
    • B01D46/523Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material with means for maintaining spacing between the pleats or folds
    • AHUMAN NECESSITIES
    • A62LIFE-SAVING; FIRE-FIGHTING
    • A62BDEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B23/00Filters for breathing-protection purposes
    • A62B23/02Filters for breathing-protection purposes for respirators
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D46/00Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/10Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)

Abstract

527,851. Air filters for gas masks &c. MINE SAFETY APPLIANCES CO. April 21, 1939, No. 12038. Convention date, April 26, 1938. [Class 81 (ii)] [Also in Group XXVIII] An air-filtering element consists of a sheet of filter material formed into a series of accordion folds one layer of each fold being narrower than its other layer, whereby the folds only partially overlap, and means, of about the same thickness as the sheet, spacing the folds apart, the element as a whole being substantially flat. The sheet 9 is folded as shown in Fig. 3 and between the folds are disposed narrow strips 19, which if of flexible material such as tape may be so located by placing the tapes on the filter material before folding, or if rigid or semirigid may be inserted after folding. In the construction shown, which is suitable for use in a canister of the kind described in Specification 450,369, the filter element is clamped between a casing 1 and a rib 17 of an outer casing 6 having a perforated face 8. The casing I is connected to breathing &c. apparatus by a coupling 4.
GB12038/39A 1938-04-26 1939-04-21 Improvements in or relating to air-purifying elements and air-purifying apparatus Expired GB527851A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US527851XA 1938-04-26 1938-04-26

Publications (1)

Publication Number Publication Date
GB527851A true GB527851A (en) 1940-10-17

Family

ID=21979870

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12038/39A Expired GB527851A (en) 1938-04-26 1939-04-21 Improvements in or relating to air-purifying elements and air-purifying apparatus

Country Status (1)

Country Link
GB (1) GB527851A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3251177A (en) * 1963-05-15 1966-05-17 Arthur K Baker Dust-free bench
GB2545080A (en) * 2015-10-30 2017-06-07 Draeger Safety Ag & Co Kgaa Particle filter and method for the production thereof
WO2019171249A1 (en) * 2018-03-08 2019-09-12 3M Innovative Properties Company Filter and mask

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3251177A (en) * 1963-05-15 1966-05-17 Arthur K Baker Dust-free bench
GB2545080A (en) * 2015-10-30 2017-06-07 Draeger Safety Ag & Co Kgaa Particle filter and method for the production thereof
US11511221B2 (en) 2015-10-30 2022-11-29 Dräger Safety AG & Co. KGaA Particle filter as well as method for the manufacture thereof
WO2019171249A1 (en) * 2018-03-08 2019-09-12 3M Innovative Properties Company Filter and mask
CN111818974A (en) * 2018-03-08 2020-10-23 3M创新有限公司 Filter and mask
US11998773B2 (en) 2018-03-08 2024-06-04 3M Innovative Properties Company Filter and mask

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