GB1282987A - Improvements in or relating to filters - Google Patents

Improvements in or relating to filters

Info

Publication number
GB1282987A
GB1282987A GB45667/70A GB4566770A GB1282987A GB 1282987 A GB1282987 A GB 1282987A GB 45667/70 A GB45667/70 A GB 45667/70A GB 4566770 A GB4566770 A GB 4566770A GB 1282987 A GB1282987 A GB 1282987A
Authority
GB
United Kingdom
Prior art keywords
corrugated
corrugations
edge
along
sept
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
GB45667/70A
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.)
Draegerwerk AG and Co KGaA
Original Assignee
Draegerwerk AG and Co KGaA
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 Draegerwerk AG and Co KGaA filed Critical Draegerwerk AG and Co KGaA
Publication of GB1282987A publication Critical patent/GB1282987A/en
Expired legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B23/00—Filters for breathing-protection purposes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/52—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material
    • B01D46/521—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material
    • B01D46/523—Particle 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

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)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
  • Filtering Materials (AREA)

Abstract

1282987 Filter element DRAGERWERK AG 24 Sept 1970 [24 Sept 1969] 45667/70 Headings B1D and B1T In a flat corrugated type of filter element for use in a respirator, the walls of corrugations are held apart by wedge-shaped spacers (Fig. 2) made of plastics strips corrugated as shown in Fig. 4, with a larger corrugation height along one edge than along the opposite edge. Height b may be reduced to zero to produce corrugations in the filter medium of triangular section. The spacer strips are corrugated by deep drawing of hot plastics sheet and have one corrugated edge longer than the other, measured along the corrugations.
GB45667/70A 1969-09-24 1970-09-24 Improvements in or relating to filters Expired GB1282987A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1948171A DE1948171C3 (en) 1969-09-24 1969-09-24 HEPA filter inserts for respiratory protection devices

Publications (1)

Publication Number Publication Date
GB1282987A true GB1282987A (en) 1972-07-26

Family

ID=5746300

Family Applications (1)

Application Number Title Priority Date Filing Date
GB45667/70A Expired GB1282987A (en) 1969-09-24 1970-09-24 Improvements in or relating to filters

Country Status (2)

Country Link
DE (1) DE1948171C3 (en)
GB (1) GB1282987A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2130914A (en) * 1982-11-22 1984-06-13 Pm Filter Konstr Ag Filter cartridge
GB2131717A (en) * 1982-11-15 1984-06-27 Atomic Energy Authority Uk Air filter
GB2196874A (en) * 1986-11-01 1988-05-11 Roger Gladding Filter element

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3400505A1 (en) * 1984-01-10 1985-07-18 Drägerwerk AG, 2400 Lübeck RESPIRATORY DEVICE WITH PROTECTIVE HOOD
DE3708052A1 (en) * 1987-03-13 1988-10-20 Michael Schroeder Device for protection against pollen

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2131717A (en) * 1982-11-15 1984-06-27 Atomic Energy Authority Uk Air filter
GB2130914A (en) * 1982-11-22 1984-06-13 Pm Filter Konstr Ag Filter cartridge
GB2196874A (en) * 1986-11-01 1988-05-11 Roger Gladding Filter element

Also Published As

Publication number Publication date
DE1948171C3 (en) 1974-07-11
DE1948171A1 (en) 1971-04-08
DE1948171B2 (en) 1973-12-06

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee
PCNP Patent ceased through non-payment of renewal fee