| 摘要 |
A burster for continuous single part business forms having a paper weight of about 32 lbs. or less utilizes a conventional transport mechanism, high speed rolls, and breaker blade. The slow speed rolls are substantially smooth surfaced (no axial grooves) and are mounted so that there is a fixed gap between them of 0.005-0.008 inches, which gap can be adjusted prior to machine operation. With this fixed gap, bubble formation in the business forms being burst does not occur, and there is no reason to use a servo or stepper motor to cycle the slow speed rolls apart and together. The high speed rolls are spring biased together and the transport mechanism includes a tractor pin feed drive located upstream of the slow speed rolls, a set of driven pull rolls between the tractor pin feed drive and the slow rolls, and a transport belt assembly. Spaced sheet metal plates may be used in place of the slow speed rolls.
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