초록

Disclosed is a polishing doctor blade for resurfacing the surface of a metal calendering roll while in operation, comprising a working surface containing diamond abrasive particles harder than the surface material.

대표청구항 ▼

In a calendering apparatus for providing a smooth surface to paper, which apparatus comprises: A. a metal calendering roll coated with a thin layer of carbide containing materials which deteriorate when faced with abrasive paper coating materials, the abrasive action of a cleaning doctor blade, and

In a calendering apparatus for providing a smooth surface to paper, which apparatus comprises: A. a metal calendering roll coated with a thin layer of carbide containing materials which deteriorate when faced with abrasive paper coating materials, the abrasive action of a cleaning doctor blade, and a corrosive environment and must be resurfaced periodically; B. a resilient pressure roll; C. means to press the resilient pressure roll and the metal calendering roll against each other to form a nip; D. means to continuously pass a web of paper through the nip; and E. means to provide heat to the surface of the metal calendering roll, the improvement which comprises a polishing doctor blade positioned against the circumferential surface of the metal calendering roll to resurface the roll while in operation, comprising a working surface containing diamond abrasive particles.