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Topic: Filter mask

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	Filter mask - Patent 6338340
		A filter mask is provided for use in environments of smoke and toxic gas which includes a filter element having a filling of shiftable bodies coated with a flowable, aloe vera extract having a gel-like viscosity and a retainer for holding the filter element over the mouth and nose of the wearer.
		A filter mask as set forth in claim 6, wherein said facial portion is configured to present a pocket oriented toward the nose and mouth of the wearer for receiving said filter element therein with said filter element positioned between the wearer's face and the facial portion.
		The filter element is removably attached to the inside of the facial portion of the mask to be in direct contact with and conform around the nose and mouth of the wearer, thus causing the inhaled air to be drawn therethrough and filtered.
	www.freepatentsonline.com /6338340.html (5123 words)

	-:¦:- All About Gas Mask, Order Gas Mask Online (Site not responding. Last check: 2007-10-18)
		A gas mask, also known as a respirator, is a mask worn on the face to protect the body from airborne pollutants and toxic materials.
		One possibility is that gas masks are for them part of a wider rubber fetishism, or that the dehumanized appearance of a person wearing a gas mask leads to erotic objectification fantasies.
		Sid Wilson, DJ for the band Slipknot (which comprises nine masked members) is known to be a collector of gas masks, and wears a variety of different types on stage.
	www.gas-mask.tk (1311 words)

	Gas mask filters. Chemical suits and radiation monitors. (Site not responding. Last check: 2007-10-18)
		filter depends on several factors, such as the hazard encountered, the concentration of that hazard, the filter type being used and the breathing rate of the wearer.
		The aerosol filter is built up of a layer of glass fibres where the spacing between the fibres is large in relation to the size of the particles to be filtered.
		The degree of leakage in modern filters is maximally 0.001 per cent and, in extreme cases, the filter provides protection against at least 10 but probably up to 100 attacks before CW agents start to leak through.
	www.surviveall.co.uk /faqfilt.htm (804 words)

	Sharpening with Unsharp Mask
		In computer-talk, "filter" is a generic word which just means a tool or process where you "put something in, and get something out", that is, it separates or refines the object in some way, a philosophy not unlike a coffee filter or a color filter.
		Unsharp Mask is the opposite, it involves making the pixels on the light side of the edge even lighter, and making the pixels on the dark side of the edge even darker, as shown, to increase edge contrast.
		The UnSharp Mask filter has parameters that allow it to have variable effect, to primarily affect the strong edges in the image, and to specifically exclude the smoother low-contrast areas.
	www.scantips.com /simple6.html (1486 words)

	Filter mask - Wikipedia, the free encyclopedia
		A half face particulate mask is generally worn to protect the wearer from dust and paint fumes.
		To aid particulate filtration, the mesh is sometimes coated with substances that enhance the tendency of particulates to adhere to the fibers.
		For gas filtration, mask cartridges are filled with activated carbon or certain resins that will absorb substances such as volatile organic compounds (VOCs), eliminating them from the air breathed.
	en.wikipedia.org /wiki/Filter_mask (272 words)

	Gas Mask FAQ
		A: A gas mask is a device that is worn to reduce the amount of contamination in the air that you breathe.
		The blower, battery and filters are usually belt-worn, and connected to the hood or mask by a breathing tube.
		If you have a mask and filter that was purchased from a swap meet, gun show or surplus store and is not in its original packaging, assume it is useless.
	www.preparedness.com /gasmaskfaq.html (3211 words)

	GAS MASKS
		The mask should fit a youth 8 years of age to a small size adult.
		Mask comes with new sealed NATO screw-on filter and filter adapter.
		This is a Israeli gas mask filter, type 80, providing protection against all known NBC agents.
	www.thesurplusstore.net /GAS_MASKS.html (369 words)

	JAPAN
		However, this mask was made of a fl rubber instead of the typical orange or tan rubber which was used on other more common gas masks during this period.
		This mask, came in two versions: one with the filter attached directly to the face piece and another with a larger filter attached via a corrugated rubber breathing tube.
		This mask is basically the same as the earlier green type but was made of a darker rubber with an exhale valve integrated into the left side of the face piece.
	www.gasmasks.net /database/japan/japan.htm (1395 words)

	Filter (chemistry) - Wikipedia, the free encyclopedia
		In chemistry and common usage, a filter is a device (usually a membrane or layer) that is designed to block certain objects or substances while letting others through.
		Filters are often used to remove harmful substances from air or water, for example to remove air pollution, to make water drinkable, to prepare coffee.
		Filtrate is the liquid produced after filtering a suspension of a solid in a liquid.
	en.wikipedia.org /wiki/Filter_(chemistry) (130 words)

	Digital Filters - Frequency Filters
		All frequency filters can also be implemented in the spatial domain and, if there exists a simple kernel for the desired filter effect, it is computationally less expensive to perform the filtering in the spatial domain.
		We obtain the filter function of a bandpass by multiplying the filter functions of a lowpass and of a highpass in the frequency domain, where the cut-off frequency of the lowpass is higher than that of the highpass.
		To perform the frequency filtering we transform both the image of the house and the mask into the Fourier domain where we multiply the two images with the effect that the frequencies occurring in the mask remain in the output while the others are set to zero.
	homepages.inf.ed.ac.uk /rbf/HIPR2/freqfilt.htm (2854 words)

	Creating a Neutral Density Filter with The GIMP
		You align the dark part of the filter with the sky and the clear part with the foreground; the split occurs roughly at the horizon.
		The layer mask has the effect of varying the opacity of each pixel in the the layer according to each corresponding pixel value in the mask.
		A fl pixel in the mask makes the corresponding pixel in the layer completely transparent, a white pixel makes it completely opaque, and any value in between is interpreted as a percentage of opacity between these two extremes.
	www.gimpguru.org /Tutorials/NDFilter (2089 words)

	Perl.com: Using Bloom Filters
		Bloom filters are named after Burton Bloom, who first described them in a 1970 paper entitled Space/time trade-offs in hash coding with allowable errors.
		Because Bloom filters use one-way hashing to store their data, it is impossible to reconstruct the list of keys in a filter without doing an exhaustive search of the keyspace.
		When using Bloom filters, we very frequently have a desired false-positive rate in mind and we are also likely to have a rough idea of how many keys we want to add to the filter.
	www.perl.com /lpt/a/2004/04/08/bloom_filters.html (2976 words)

	::::Nano Mask::: (Site not responding. Last check: 2007-10-18)
		Features 2H Technology Plus™, a patented filter that consistently achieves high levels of performance by utilizing nanotechnology enhanced filter media to remove virus and bacteria from inhaled and exhaled breath.
		This Nano mask is the first face mask in the world to utilize nanotechnology enhanced filter media to effectively isolate and destroy viral and bacterial contaminants.
		An inability to effectively seal against the face and filter inhaled and exhaled breath that will typically follow the path of least resistance; around the sides of the mask.
	www.buy-nanomask.com /nano_mask.html (269 words)

	Air Filter for Safe Rooms - The Whole Room Gas Mask NBC 450
		Every Filter Science nuclear weapons, biological weapons, and chemical weapons filter comes equipped for use in a standard 110 Volt wall outlet.
		It is finished with a heavy electrostatically applied powder coat to assure your filter will look the same as it does today, in twenty years.
		Every filter component is rigorously tested to exacting standards, before it reaches the assembly stage.
	www.filterscience.com /safe-rooms_gas-mask_filter_450.html (390 words)

	perl.com: Using Bloom Filters
		The second example compares the mask to the corresponding positions in the filter -- if all of the on bits in the mask are also on in the filter, we know we've found a match.
		By exchanging Bloom filters instead of explicit lists of contacts, users can participate in social networking experiments without having to admit to the world who their friends are.
		If you are passing filters around a network, you will want to optimize them for minimum size; this paper gives a good overview of compressed Bloom filters.
	www.perl.com /pub/a/2004/04/08/bloom_filters.html?page=2 (1463 words)

	Honeycomb Mask with Carbon Filter - Allergy Relief Masks
		The Honeycomb Mask is made with a disposable activated carbon filter, sealed inside a comfortable lightweight frame.
		It also filters from 50% to 95% of household chemicals, depending on the substance.
		Refill with disposable carbon filters; mask is washable.
	www.achooallergy.com /mask-honeycombmask.asp (448 words)

	Carbon Filter
		A former distributor of masks using the same activated carbon filter in a different frame provided reports that the activated carbon filter has been tested by three independent facilities in order to verify it’s efficiency in filtering air-borne pollutants and contaminants.
		Inward leakage is the amount of air that is breathed while wearing an air filtering mask which does not pass through the air filter and is thus breathed as if no mask was worn.
		This is a very important figure and the overall effectiveness of any air filter mask is directly related to the amount of inward leakage the mask allows.
	www.icanbreathe.com /carbon.htm (1258 words)

	MSA CBRN Gas Mask Filters
		The Millennium mask using this filter provides first responders with effective respiratory protection against chemical, biological, radiological and nuclear (CBRN) agents that might be used in a terrorist attack.
		This filter was just produced by MSA as their primary CBRN Chemical Biological Radiological and Nuclear filter.
		This CBRN NIOSH approval was just implemented by the federal government in 2004 and the MSA Millennium CBRN mask kit is the first and as of June 2004 the only respirator system to apply for and pass this series of tests.
	www.nbcgasmask.com /NBCFilters/msa-cbrn.htm (310 words)

	FAQs on personal protective equipment like safety respirators, gas masks and survival kits from EvacuTech. (Site not responding. Last check: 2007-10-18)
		As particles pass through the mask, they are electrically attracted to the fibers and then trapped in the grid, allowing the filtered air to flow through.
		Generally, escape hoods or escape masks with canister-type filtration units, weigh upwards of one-half pound and are not considered portable or convenient to carry.
		The Ready Mask® will provide a comparable level of performance to military masks against smoke, biological and radioactive contaminants, giving the wearer enough time to escape from a contaminated area, but is not designed to protect against chemical fumes and gases.
	www.readymask.com /faq.asp (3023 words)

	JDOM v1.0: Class ContentFilter
		A general purpose Filter able to represent all legal JDOM objects or a specific subset.
		Filtering is accomplished by way of a filtering mask in which each bit represents whether a JDOM object is visible or not.
		Returns whether the two filters are equivalent (i.e. the matching mask values are identical).
	www.jdom.org /docs/apidocs/org/jdom/filter/ContentFilter.html (280 words)

	Filter Mask (Site not responding. Last check: 2007-10-18)
		You will start using the dust filter mask on your yearlings for industrial and natural air pollution, which is taking its toll right now at many tracks throughout the country.
		Use the mask as a steamer for cleansing the horse's mucous membrane.
		The Protecto mask can be used in the stall as a natural steamer operation on the heat of the breath of the animal.
	www.protectohorse.com /mask.html (543 words)

	Approved Gas Masks - New NBC Masks from MSA Scott SGE North and more gas mask and filter
		DETAILS: The Israeli masks are actually the single widest used model in the world and are highly effective but only when certain criteria are met; the mask must be within it's 20year lifespan (most are not), must have the valves and seals thoroughly inspected, and must be used with a new, current production filter.
		We occasionally obtain a shipment of brand new 2003 Israeli masks, which are the only Israeli masks that should be trusted.
		These Russian masks are a triumph in the world of completely useless gas masks, possibly the worst mask still being sold by unscrupulous surplus stores & internet vendors.
	www.approvedgasmasks.com /defective-masks.htm (710 words)

	Ragtop Observatory (Site not responding. Last check: 2007-10-18)
		The off-axis mask is primarily for lunar and solar observing - to increase contrast by eliminating the diffraction effects of the corrector plate's central obstruction and also to reduce the brightness typical with the lunar surface (and of the solar disc when used with the solar filter).
		It has three small spring plungers that snap into an annular groove on the aperture ring of the off-axis mask, securing it in place.
		The off-axis mask is painted white on the front face to reduce heating effects during solar viewing.
	www.rci.rutgers.edu /~lippen/oa_mask_solar_filter.html (96 words)

	Honeycomb Carbon Mask; pollution, smog, perfume, fragrance, diesel, fumes, smoke, mold, dust, dander, pollen, paint, ...
		A traveler reports the carbon mask is effective in heavily polluted areas: Hanoi, Delhi, and Kathmandu.
		When pollution is not a problem, mask may be worn without a filter to screen pests.
		I wore the mask whenever I flew and again I feel this is the reason I was not sick in the 4 months I was overseas.
	www.icanbreathe.com /favorite.htm (1810 words)

	hepa filter mask Guide at YouSeekIt.com (Site not responding. Last check: 2007-10-18)
		Around that same time, masks were also made for divers and coal miners who were constantly exposed to dangerous air, but it wasn't until the 1850s that the first gas mask was developed by John Stenhouse.
		According to studies, HEPA filters, which were the biggest rage of the era, filtered out 99.7% of all the allergens in the air and all micron offenders of size 0.3 and larger.
		Newer devices, such as Nebulizers, were able to filter out offenders of size 0.1 and larger and still keep the 99.7% filter level.
	www.youseekit.com /articles/pages/HEPA_Filter/hepa_filter_mask.htm (669 words)

	Behind the Unsharp Mask: The Secret World of Sharpening - Photo Tips @ Earthbound Light
		But since the mask image is slightly out of focus, its tones will bleed a bit and give us halos surrounding all the edges in the image.
		When unsharp mask is employed in Photoshop, we don't really see the inverted mask layer.
		Even though Amount is at the top of the set of controls in the Unsharp Mask dialog, you should generally start with the Radius control.
	www.earthboundlight.com /phototips/unsharp-mask.html (1614 words)

	air filters Austin Air Austin Healthmate ozone air purifiers ultra violet negative ions HEPA vacuum Cutting Edge ...
		If you have a CITY mask you can upgrade to the TECNO for $34.95 (this includes 1 Filter and a set of special valves whicha are required to upgrade the unit).
		This mask is specifically for the chemically sensitive user who might react to the Neoprene in the Respros one.
		The I Can Breathe!® feather light, porous Honeycomb Mask holds a light weight activated carbon filter combined with two inner polyester linings which absorb and filter odors, fumes, and finer particles, may reduce exposure from 50% to 95% depending on the substance.
	www.cutcat.com /page3i.html (486 words)

	Medical Supplies (Site not responding. Last check: 2007-10-18)
		i+CARE Virus Filter Mask is a high technology mask using PENTAX Ceramic Filter Coated Hydroxyapatite that is proved to protect the wearer against microbial and viral infections such as SARS and Influenza virus, as well as a dust and pollen.
		The Structure of i+CARE VIRUS FILTER MASK is composed of Hypo-allegenic Guaze Fabric, Micro Web Filter for small dust and pollen and The Hydroxyapatite Filter which is the Bio-ceramic filter performing as bio-electrostatical magnet.
		Because of their ion-exchange ability, adsorption capacity, and acid-base properties, the Hydroxyapatite ceramic is widely used for filtering the microbacteria and virus.
	www.imed.co.th /medical.htm (592 words)

	Nose filter & surgical mask for the Avian Bird Flu - Merritt Island, FL (Site not responding. Last check: 2007-10-18)
		Toby's Nose Filters, Inc. with the assistance of the NASA funded SATOP program has developed a solution to your problem dealing with viruses and bacteria.
		The impregnated copper fabric is found both in the nose filters and masks sold on this website.
		This NIOSH N95 mask is the only mask with built-in anti-microbial fiber protection, killing microbes on contact.
	www.birdflufilter.net (181 words)

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