| 摘要 |
A method of packaging a spring unit (10) of plural coil springs (20) for use in a mattress in which first (26) and second (28) webs of spring insulator material are fixedly located against the top (12) and bottom (14) surfaces of a spring unit (10). The longitudinal margins (36, 38) are either respectively folded around the top (22) and bottom boils (24) and secured to itself, or matched up with the respective margin of the opposite web and secured to it by ultrasonic welding, bonding, etc. The spring units (10) are then compressed by roll-packing (60) so as to substantially reduce the shipping volume. |
