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US1951955A - Air filter - Google Patents

Air filter Download PDF

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Publication number
US1951955A
US1951955A US1951955DA US1951955A US 1951955 A US1951955 A US 1951955A US 1951955D A US1951955D A US 1951955DA US 1951955 A US1951955 A US 1951955A
Authority
US
United States
Prior art keywords
air filter
air
filter
wood
filed march
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 - Lifetime
Application number
Publication date
Application granted granted Critical
Publication of US1951955A publication Critical patent/US1951955A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D27/00—Envelopes or like essentially-rectangular flexible containers for postal or other purposes having no structural provision for thickness of contents
    • B65D27/08—Envelopes or like essentially-rectangular flexible containers for postal or other purposes having no structural provision for thickness of contents with two or more compartments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D27/00—Envelopes or like essentially-rectangular flexible containers for postal or other purposes having no structural provision for thickness of contents
    • B65D27/32—Opening devices incorporated during envelope manufacture
    • B65D27/34—Lines of weakness

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filtering Materials (AREA)

Description

arl Z0, 1934., G w wlLDE DUPLEX ENVELOPE Filed March 18, 1935 F, 0 d VQ .5 M
March 20, l934.
W. A. WOOD AIR' FILTER Filed March 1e. 1932 2 Sheeis-Sheet l 'I lNVawoR.
#Va/fer ,4 Wood A TTORNE Y S
US1951955D Air filter Expired - Lifetime US1951955A (en)

Publications (1)

Publication Number Publication Date
US1951955A true US1951955A (en) 1934-03-20

Family

ID=3426195

Family Applications (1)

Application Number Title Priority Date Filing Date
US1951955D Expired - Lifetime US1951955A (en) Air filter

Country Status (1)

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US (1) US1951955A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2775396A (en) * 1953-11-12 1956-12-25 Lindner Joseph Mailing envelope
US3180238A (en) * 1961-07-19 1965-04-27 Acme Highway Prod Groove filler
US3343749A (en) * 1966-04-27 1967-09-26 American Paper Prod Church contribution envelope
US3369732A (en) * 1965-10-22 1968-02-20 Bror E. Hanson Envelopes
US3773250A (en) * 1971-07-14 1973-11-20 N Am Dye Corp Ltd Medication dispensing
US3874582A (en) * 1973-04-30 1975-04-01 Yen Wang Reusable envelope
WO1984003269A1 (en) * 1983-02-15 1984-08-30 Burroughs Corp Mailer set
US4775095A (en) * 1987-01-05 1988-10-04 Emmott Gary G Remailable envelope
US4915287A (en) * 1988-11-03 1990-04-10 Moore Business Forms, Inc. Intelligently imaged envelopes with intelligently imaged integral tear-off flaps

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2775396A (en) * 1953-11-12 1956-12-25 Lindner Joseph Mailing envelope
US3180238A (en) * 1961-07-19 1965-04-27 Acme Highway Prod Groove filler
US3369732A (en) * 1965-10-22 1968-02-20 Bror E. Hanson Envelopes
US3343749A (en) * 1966-04-27 1967-09-26 American Paper Prod Church contribution envelope
US3773250A (en) * 1971-07-14 1973-11-20 N Am Dye Corp Ltd Medication dispensing
US3874582A (en) * 1973-04-30 1975-04-01 Yen Wang Reusable envelope
WO1984003269A1 (en) * 1983-02-15 1984-08-30 Burroughs Corp Mailer set
US4775095A (en) * 1987-01-05 1988-10-04 Emmott Gary G Remailable envelope
US4915287A (en) * 1988-11-03 1990-04-10 Moore Business Forms, Inc. Intelligently imaged envelopes with intelligently imaged integral tear-off flaps

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