Abstract: An appliance for the application of a tooth whitening preparation comprises an applicator configured as a partial dentition arch. The applicator includes an outer casing panel, to which is adhered a formative inner liner having a relatively low softening temperature. The applicator is user fitted by immersion in hot water to soften the liner which is then impressed against buccal tooth surfaces. A tooth whitening preparation is deposited upon the buccal impressions formed in a fitted liner or is directly applied to buccal tooth surfaces. Thereafter, the appliance is worn for prescribed treatment duration, precluding dilution of the tooth whitening preparation as well as assuring against gingival contact with such preparation.

Abstract: A process for making a freezably stable emulsion based food salad. A freezing point depression agent, such as propylene glycol, is added to a water component of the emulsion to prevent the formation of ice crystals during freezing of the non-aqueous salad components and to prevent oil separation upon thawing. A hardenable oil such as partially hydrogenated soybean oil, provides an elevated emulsion melt point. Microbial control is maintained during processing by oxygenating the water component. The frozen food salad may be-containerized for shipping or used as a frozen sandwich filling.

Abstract: An interocclusal appliance includes a maxillary impression preform of a resilient thermoplastic having a low softening temperature, e.g. 36° C., such as an EVA copolymer having approximately thirty percent vinyl acetate. The preform is molded over and unitarily bonded to a base having a planar bottom face contacted by mandibular occlusal surfaces. The base is formed of a thermoplastic having a higher softening temperature, e.g. 70° C., with the bond between the preform and base characterized by high shear strength. The preform includes a bight shaped centric relation positioning channel having a thick footing and draft along lingual, buccal and labial walls. The appliance is fitted by immersion in hot water to soften the preform, seating the maxillary arch within the channel and biting, such that the impression of the maxillary dentition embeds in the softened preform. Upon cooling, the preform is transformed into a reusable resilient encasement for the maxillary dentition.

Abstract: An air-cooling device comprises compressor (1). Double cavity heat exchanger (2), turbo expander (6) and the freezing chamber (3) containing fan (5) and air cooler (4). Fan (7) is mounted on the same shaft with the turbo expander (6). The first cavities of the heat exchangers (9 and 2), moist separator (8) and the second cavity of the heat exchanger (2) are connected with the compressor (1) input in sequence. In the other appearance the device comprises compressor (44) and turbo expander (49), double cavity heat exchanger (45), freezing chamber (46) containing fan (48) and air cooler (47), double cavity vaporization heat exchanger (51) and moist separator (50). The first cavities of the vaporization heat exchangers (51 and 45), moist separator (50, turbo expander (49), air cooler (47) and the second cavity of the heat exchanger (45) are in sequence connected with the compressor input (44).

Abstract: A noise abatement ring having a low coefficient of friction is captured in an annular channel on the inner face of a wheel cover and abuts a vehicle wheel when the wheel cover is mounted to the wheel. The wheel cover is assembled by registering radial tabs formed on a wall of the channel and spaced from the base of the channel with notches formed in the ring and seating the ring into the channel. Thereafter, the ring is rotated relative to the wheel cover into a captive position, wherein the tabs and notches are no longer registered and with the tabs overlying reduced thickness stepped portions of the ring. A leaf spring latch, formed in one piece with the ring, seats into a detent on the inner face of the wheel cover to prevent rotation of the ring from the captive position.