Aperture, screen

According to the perspective writers of the Renaissance, who entertained no such hermetic-erotic fantasies, their picture plane was additionally to become an intersection, that is a grid with equal squares and looking like a wide apertural screen woven from the finest of threads. Another idea apparently initiated hy Alherti was that a suitable model for the goal of the painter, the agent of illusionism, should he the mirror image. The notion quickly became a commonplace in art theory and was, for instance, repeated in the seventeenth century hy a Frenchman, Ahraham Bosse ... 

Screen the sucrose through a 2-mm-aperture screen into a mixer. 

Mill the remaining ingredients, with the exception of the flavor, through a 1-B band (1.27 mm aperture, or similar) or 0 band (686 micron aperture, or similar) with impact forward at high speed, or screen through a 840-micron aperture screen. 

Screen the wet mass through a 16-mm-aperture mesh (hammer mill) or a 4-mm-aperture screen (oscillating granulator) and spread evenly onto trays. 

Add this solution to the main batch through a 420-micron-aperture screen with mixing. 

Pass trimethoprim/sulfamethoxazole mass from step 4 and balance of sulfamethoxazole through a 595-micron-aperture screen in Fitzmill knives forward, medium speed, and slowly add to main tank with continuous agitation. 

If necessary, mill zinc oxide in a Fitz mill or similar impact-forward, maximum-speed mill, fitted with a 250-pm aperture screen. Repeat three times. Heat 800 mL of water to 75°C in a steam-jacketed mixing tank and dissolve methylparaben. 

Run through 200 mesh (74-prn aperture) screen on Homoloid mill directly into main portion of petrolatum-oil mixture. 

Type of decks angle Aperture" Screen deck type Accessories... 

Comparisons were made to BS3412 1976 (superseded by BS 3412 1992 [9]) using a 25 mm extruder equipped with a 150 pm aperture screen supported by 250 pm, 420 pm screens and a breaker plate. After extruding 640 g 10 g and purging the... 

A diffuser G is illuminated with a He-Ne laser, trough a rectangular aperture A, which limits the illuminated area. A graduated screen is located at the observation plane 110(71, ), located at a distance D from the reference plane n(x,y), and perpendicularly arranged to the incident laser beam. The rotation axis y is also perpendicular to the beam. 

Screen aperture, mm (mesh) Cumulative, % Screen aperture, mm (mesh) Cumulative, % Screen aperture, mm (mesh) Cumulative, %... 

Percentage of cumulative equals the percentage of MOP that is guaranteed not to pass through a given screen aperture. 

Screen aperture, mm (mesh) Granular Standard Special standard... 

Fig. 1. Probabihty of a particle size t passing through a square aperture of size b. See text for discussion of the various curves. However, the probabihty of such a particle passing, when approaching the screen plate normally, is as shown in equation 1 (2) ...

The top size of the feed to a screen deck should not be greater than two to four times the aperture size of the deck. Double- (see Fig. 3) or triple-deck screen arrangements are used, requiring a separate sizing for each deck. Then the final screen size is set by the largest deck. 

Data for dry screening on a 20-mm square aperture vibrating screen (8) indicate that the screen is relatively efficient, giving an apparent bypass value of 0.5%, sharpness index of 0.8, and a cut size of 20 mm. On the other hand, results (9) from a plant operating an 8 ft x 20 ft (2.4 m x 6.1 m) double-deck screen with 16 mm woven wire bottom screen deck gave an apparent bypass of 4%, sharpness index of 0.56, and a cut size of 17 mm. Data (10) for smaller... 

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