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 apparatusInfo
- 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
Links
- 238000010276 construction Methods 0.000 abstract 1
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 238000001914 filtration Methods 0.000 abstract 1
- 230000029058 respiratory gaseous exchange Effects 0.000 abstract 1
Classifications
-
- 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
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B23/00—Filters for breathing-protection purposes
- A62B23/02—Filters for breathing-protection purposes for respirators
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets 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.
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)
| 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 |
-
1939
- 1939-04-21 GB GB12038/39A patent/GB527851A/en not_active Expired
Cited By (6)
| 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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