| 摘要 |
A folder 10 for folding flat piece laundry as delivered from an ironer is disclosed. Folder 10 includes a logic controller (70) which calculates the position on the laundry piece where the fold is to be made and activates air jets (57, 58 and 59) to make the fold at the proper position. The proper position is calculated by directly calculating the length of a laundry piece by providing a sprocket gear 43 which rotates in a fixed relationship to the speed of a motor (42) and the surface speed of a conveyor (12). A proximity switch (49) counts pulses as the sprocket gear 43 rotates. Each pulse defines a known increment of linear length of the conveyor (12) in fixed proportion to the rotation of the motor (42). In the method disclosed, one of the steps compensates for slippage of the laundry piece in the folder caused by operating the folder at a slightly greater speed than the ironer.
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