Method for determining air density

A method for determining a present air density for an imaging mechanism (20) is presented. During a first time period (77, 101, 105): in a determining and storing action, a nominal air density is stored (66, 100). In an increasing action, a fan input is increased (72, 96) until a known pressure in a...

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Bibliographische Detailangaben
Hauptverfasser:	MEDIN, TODD R, BEEHLER, JAMES O
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CINEMATOGRAPHY CORRECTION OF TYPOGRAPHICAL ERRORS ELECTROGRAPHY ELECTROPHOTOGRAPHY HOLOGRAPHY i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES LINING MACHINES MAGNETOGRAPHY MEASURING PERFORMING OPERATIONS PHOTOGRAPHY PHYSICS PRINTING SELECTIVE PRINTING MECHANISMS STAMPS TESTING TRANSPORTING TYPEWRITERS
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Beschreibung
Zusammenfassung:	A method for determining a present air density for an imaging mechanism (20) is presented. During a first time period (77, 101, 105): in a determining and storing action, a nominal air density is stored (66, 100). In an increasing action, a fan input is increased (72, 96) until a known pressure in a cavity coupled to a fan receiving the fan input has been reached. In a determining and storing action, a nominal fan parameter is determined and stored (74, 76, 98, 108) after the known pressure is reached. During a second time period (95, 103, 109): in an increasing action, the fan input is increased (84) until the known pressure in the cavity has been reached. In a determining action, a present fan parameter is determined (86, 106) after the known pressure is reached. In a calculating action, the present air density is calculated (88, 102, 108) from the present fan parameter, the nominal fan parameter, and either the known pressure or the nominal air density.