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1380 results about "Sheet film" patented technology

Sheet film is large format and medium format photographic film supplied on individual sheets of acetate or polyester film base rather than rolls. Sheet film was initially supplied as an alternative to glass plates. The most popular size measures 4×5 inches; smaller and larger sizes including the gigantic 20×24 inches have been made and many are still available today.

Combined monitor and light box assembly

A combined monitor and light box assembly installable in a crib enclosure occupied by an infant. The assembly which is interactive with the infant includes a light box on whose front face is mounted a semi-reflective mirror behind which is a film transparency having a photographic image of the infant's mother. When a light bulb in the box is energized to illuminate the transparency, the image of the mother becomes visible to the infant through the mirror which is then effectively transparent. Associated with the light box is a sound-activated switching device connected between the bulb and a power source. The switching device, when activated by crying sounds emanating from the infant, remains activated for a predetermined period to energize the bulb and illuminate the transparency. Also associated with the light box is a record playback unit having stored therein a voice message recorded by the mother addressed to her infant, the unit being rendered operative only when the bulb is energized. Hence when the infant cries, it is then presented with an image of its mother and hears her comforting message, as a consequence of which the infant is induced to stop crying. The monitor which is operative only after the switch is activated, radio-transmits the crying sounds then emanating from the infant to a receiver that can be heard by the mother.
Owner:SPECTOR DONALD

Process for production of hydrogel particles and process for cutting of high-concentration hydrogel sheet

An object of the present invention is to make it possible that: a high-concentration hydrogel sheet, which is suitable for production of high-performance water-absorbent resin particles, is cut efficiently without involving the adhesion to such as cutting-blades; and the subsequent disintegration operation is also successfully carried out; and hydrogel particles excellent in the quality and performances are efficiently produced. As a means of achieving this object, the process according to the present invention for production of hydrogel particles is a process for production of the hydrogel particles 14 from a high-concentration hydrogel sheet 10 and comprises: a step (a) of cutting a continuous sheet 10 of a crosslinked high-concentration hydrogel polymer of 50 to 80 weight % in solid component concentration every 10 to 100 cm lengthwise of the continuous sheet 10 while running it lengthwise, thereby obtaining cut pieces 12; and a step (b) of continuously supplying the cut pieces 12 (obtained from the step (a)) to a continuous disintegrator 40 to continuously carry out disintegration and discharge under conditions where the supply amount of the cut pieces 12 and the disintegrating and discharging abilities of the continuous disintegrator 40 satisfy (supply amount)≦(disintegrating and discharging abilities), thereby obtaining the hydrogel particles 14.
Owner:NIPPON SHOKUBAI CO LTD

Laser projection apparatus with liquid-crystal light valves and scanning reading beam

Laser lines at 635 nm or longer (ideally 647 nm) are preferred for red, giving energy-efficient, bright, rapid-motion images with rich, full film-comparable colors. Green and blue lines are used too—and cyan retained for best color mixing, an extra light-power boost, and aid in speckle suppression. Speckle is suppressed through beam-path displacement—by deflecting the beam during projection, thereby avoiding both absorption and diffusion of the beam while preserving pseudocollimation (noncrossing rays). The latter in turn is important to infinite sharpness. Path displacement is achieved by scanning the beam on the liquid-crystal valves (LCLVs), which also provides several enhancements—in energy efficiency, brightness, contrast, beam uniformity (by suppressing both laser-mode ripple and artifacts), and convenient beam-turning to transfer the beam between apparatus tiers. Preferably deflection is performed by a mirror mounted on a galvanometer or motor for rotary oscillation; images are written incrementally on successive portions of the LCLV control stage (either optical or electronic) while the laser “reading beam” is synchronized on the output stage. The beam is shaped, with very little energy loss to masking, into a shallow cross-section which is shifted on the viewing screen as well as the LCLVs. Beam-splitter/analyzer cubes are preferred over polarizing sheets. Spatial modulation provided by an LCLV and maintained by pseudocollimation enables imaging on irregular projection media with portions at distinctly differing distances from the projector—including domes, sculptures, monuments, buildings; waterfalls, sprays, fog, clouds, ice; scrims and other stage structures; trees and other foliage; land and rock surfaces; and even assemblages of living creatures including people.
Owner:TROYER DIANE
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