| 摘要 |
<p>An arrangement for dispensing colour paste, a shading apparatus, a method, a computer program product, and a memory means. The arrangement comprises a piston pump (1) comprising a dispensing channel (11). The dispensing channel (11) is provided with a substantially different amount of colour paste per travelling length unit when the piston (3) is moving towards the first end of the cylinder (2) than when the piston (3) is moving towards the second end of the cylinder (2). The arrangement further comprises a valve connected to a dispensing channel (11). The valve has a dispensing channel (14) connected to a first outlet channel of the valve for conveying colour paste into a can (13) and a by-pass feed channel (12) connected to a second outlet channel of the valve for conveying colour paste past the can (13) for the paste to be shaded.</p> |
