DELAYED SHUT-DOWN OF PRESSURIZATION FAN
Original Publication Date: 1977-Apr-30
Included in the Prior Art Database: 2004-Mar-29
Xerox Disclosure Journal
A delayed shut-down timer is provided to continue the opera-tion of a copier's filtered air input fan (internal pressuri-zation fan) for a preset time period, controlled by the timer, after regular machine shut-down. The time delay after shut-down is sufficient to allow cooling of hot internal corn-porients. This is in lieu of leaving the pressurization fan on all the time. Turning the fan off right at shut-down is undesirable since hot components within the apparatus can create undesirable contaminating air flows adjacent the photoreceptor for some time after shut-down.