B65D47/20- Closures with discharging devices other than pumps comprising hand-operated members for controlling discharge.
B65D47/04- Closures with discharging devices other than pumps.B65D47/00- Closures with filling and discharging, or with discharging, devices.BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR PACKAGING ELEMENTS PACKAGES B65D- CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g.B65- CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL.
-1 for example Substances 0.000 description 1.235000003343 Brassica rupestris Nutrition 0.000 description 1.
235000003351 Brassica cretica Nutrition 0.000 description 1.238000005859 coupling reaction Methods 0.000 description 3.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 Curtis R Swartz filed Critical Curtis R Swartz Priority to US228199A priority Critical patent/US2670884A/en Application granted granted Critical Publication of US2670884A publication Critical patent/US2670884A/en Anticipated expiration legal-status Critical Status Expired - Lifetime legal-status Critical Current Links Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number US228199A Inventor Curtis R Swartz Original Assignee Curtis R Swartz Priority date (The priority date is an assumption and is not a legal conclusion.
#Slit like openin pdf
Google Patents Self-sealing closure tubeĭownload PDF Info Publication number US2670884A US2670884A US228199A US22819951A US2670884A US 2670884 A US2670884 A US 2670884A US 228199 A US228199 A US 228199A US 22819951 A US22819951 A US 22819951A US 2670884 A US2670884 A US 2670884A Authority US United States Prior art keywords tube closure tube slit opening closure Prior art date Legal status (The legal status is an assumption and is not a legal conclusion.
#Slit like openin free
Thus, the openings of diffused sound field show comparatively simple natures to free field and the application of its nature to architectural noise control is made with ease with wide application.- Google Patents US2670884A - Self-sealing closure tube 5) the transmission loss of the openings cannot be neglected. From this investigation, the author illustrated that the sound directivity of sound radiation is non-directivity for low-frequency and for high frequency range, (ka≫1) the cosθ law is applicable, and that the sound transmission loss of the opening is zero for high frequency but for low frequency (ka<0. In this report, the author investigated sound directivities of sound radiation from the openings of diffused room, and sound transmission through them, experimentally and theoretically. In an another report, under the assumption that the opening from a diffused sound field has the nature as though it is a plane-like assembly of non-directional point source, the author analysed the sound intensity attenuation along the perpendicular centre line from circular and slit-like opening of diffused room, and then proved experimentally that the logical formula of attenuation being applicable resonable for diffused sound of all frequencies.
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