Abstract: A mounting assembly includes an expansion card having a slot cover, a chassis having a rear wall, the rear wall forming two opposite support tabs thereon, and a pivoting member pivotally mounted to the chassis between the two support tabs. The rear wall defines a through slot below the two support tabs for the slot cover covering thereon. At least one support tab forms a positioning portion thereon. The slot cover has a fixing portion thereon. The pivoting member has a locking portion for engaging with the positioning portion, and a retaining portion for pressing on the fixing portion of the slot cover. The mounting assembly further includes a positioning block securely attached to the chassis opposite to the rear wall of the chassis, and another pivoting member pivotally mounted to the positioning block for retaining another end of the expansion card.

Abstract: A feed roll assembly which includes an axle installed in for example a fax machine and having a noncircular extension rod at one end, a roll fixedly mounted around the axle in the middle and turned by it to delivery inserted sheet of paper, a coupling wheel coupled to the non-circular extension rod of the axle and turned with it, the coupling wheel having an outward flange at one end and a plurality of wedge-like grooves spaced around the periphery adjacent to the outward flange, a transmission gear revolvably mounted around the non-circular extension rod of the axle, and a spring movably mounted around the coupling wheel and stopped between the transmission gear and the outward flange of the coupling wheel and having a rear end moved in an arched groove in the transmission gear and a front end moved relative to the radially spaced wedge-like grooves of the coupling wheel, wherein the spring is compressed and coupled to the coupling wheel when the transmission gear is rotated forwards, thereby causing the cou