| 摘要 |
A feed mechanism for a printer includes a support structure. A sheet feed assembly is mounted on the support structure to feed sheets from a stack of sheets to the printer along a feed path. A nozzle assembly is movably mounted on the support structure and includes at least one nozzle that opens towards the stack of sheets. A displacement mechanism moves the nozzle assembly reciprocally between the stack of sheets and the sheet feed assembly. A gas supply is connected to the nozzle assembly and is operable so that a gas stream emitted from the, or each, nozzle penetrates a first sheet in the stack to generate a cushion of gas between the first sheet and a second sheet, thereby lifting the first sheet from the second sheet. The gas supply is reversible so that the first sheet can be retained against the nozzle assembly as the nozzle assembly is moved towards the feed assembly such that the feed assembly can feed the first sheet along the feed path.
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