| 摘要 |
The invention concerns an apparatus (40) and method for increasing the fin density of a serpentine sheet (10) having a plurality of fins (14a, 14b, 14c), each fin having two sides (16, 18) coupled together at one end (20) with a space (22) between the sides. Blocks (30,32) having recesses (30a, 32a) for receiving the end (20, 24) of one side (16) of a fin (14a) are moved vertically from opposite sides (A,B) of the sheet (10) into contact with such ends. Simultaneously, blades (34, 36) are moved vertically into positions at the other side (18) of the fin (14a) from opposite sides (A, B) of the sheet. Then, the blades (34, 36) are moved transversely towards the blocks (30, 32), which are now held stationary, to compress the fin (14a) a predetermined amount by moving the other fin side towards the one fin side. The blocks and blades are then withdrawn from the sheet to move another fin (14b) into position for another compressing operation.
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