Sterile filling method and device
The invention is a method for sterilizing, filling and closing packaging containers that are open on one end.
Packaging containers (A) bottles move along a conveyor (B) into a hygienic chamber (C), where they are exposed to a sterilizing agent, like hydrogen peroxide, that is removed with sterile, hot air. The bottles or containers then flow on to a carrier (D), where the bottles are filled with a sterile product and then sealed with a sterile closure.
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The system, according to the inventors, offers an alternative to a cleanroom filling operation and can be used to bottle foodstuffs, such as milk.
Patent number: 6,351,924 B1
Date granted: March 5, 2002
Inventors: Per Gustafsson and Paolo Fontanazzi, Tetra-Laval Holdings & Finance, S.A. (Lund, Sweden)
Thermal sterilization verification
A spectrophotometer reads selected wavelengths on the test ampoule and directs them through a connector, which are then processed by a computer. The thermal sterilization indicator process, apparatus and test indicator enables the detection of microbial sterility during a thermal sterilizer cycle by measuring visible light absorption due to a chemical change in an encapsulated liquid indicator material. This process includes measurements taken when a thermal sterilizer cycle is completed without a time-delay requirement for spore growth, and in which the liquid indicator material includes a growth nutrient and microbes.
Patent number: 6,340,590 B1
Date granted: January 22, 2002
Inventor: John R. Gillis, of Bozeman, MT
Smock and fabric
A dustproof fabric for use in manufacturing a cleanroom smock in a semiconductor environment includes an inner layer of a knitted fabric (A), an intermediate layer attached to the inner layer (B), a non-micro porous polyurethane resin film possessing a high degree of moisture absorbency (C) and an outer layer attached to the intermediate layer that is made of a high density polyester woven fabric containing conductive yarn in the warp and weft (D).
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Patent number: 6,348,116 B1
Date granted: February 19, 2002
Inventors: Chang-su Lon, Hyeog-ki Kim, Sue-ryeon Kim, Il-kyoung Kim, Samsung Electronics Co. Ltd. (Suwon, Korea)
Filter
A particle absorber is fixed on the surface of the honeycomb structure (A) that is formed by placing a thin flat sheet (B) between the corrugated sheet (C) using a powder such as talc, kaolin mineral, bentonite, diatom earth, silica, alumina a mixture of silica and alumina, aluminum silicate, activated alumina, porous glass, activated clay, activated bentonite or synthetic zeolite.
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The filter is enclosed in aluminum panels (D) that can adsorb and remove both gaseous basic impurities and gaseous organic impurities, making it an effective filter for manufacturing semiconductor and liquid crystal displays.
Patent number: 6,352,578 B1
Date granted: March 5, 2002
Inventors: Soichiro Sakata, Katsumi Sato, Hideto Takahashi, Takao Okada, Takasago Thermal
Engineering Co. Ltd. (Tokyo)
Packaging method
The packing method for an object to be transported into or within a cleanroom can reduce the amount of waste, according to the inventors.
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Packing material (A), which wraps an object (B) to be carried in a cleanroom (C) is composed of a low dust generation material. The inventor says the use of a thin film, such as plastic or polyethylene, polypropylene or polyethylene terephthalate, can be cleaned and reused, thus reducing waste and saving money.
Patent number: 6,351,925 B2
Date granted: March 5, 2002
Inventors: Satosi Isido, Tokyo
Electron Limited (Tokyo)