A roll in a Fourdrinier paper-making machine; used to compact the sheet and sometimes to imprint a watermark.

Related Terms

POLISHING ROLL

A roll or series of rolls on a plastics mold; has highly polished chrome-plated surfaces; used to produce a smooth surface on a plastic sheet as it is extruded.

PINCH BAR

A pointed lever, used somewhat like a crowbar, to roll heavy wheels.

PEN RECORDER

A device in which the varying inputs (electrical, pneumatic, mechanical) are marked by a signal-controlled pen onto a continuous recorder chart (circular or roll chart).

NUTATING-DISK METER

An instrument for measuring flow of a liquid in which liquid passing through a chamber causes a disk to nutate, or roll back and forth, and the total number of rolls is mechanically counted.

MAXIMUM BELT SLOPE

A slope beyond which the material on the belt of a conveyor tends to roll downhill.

KISS-ROLL COATING

Procedure for coating a substrate web in which the coating roll carries a metered film of coating material; part of the film transfers to the web, part remains on the roll.

IMPACT ROLL

An idler roll protected by a covering of a resilient material from the shock of the loading of material onto a conveyor belt, so as to reduce the damage to the belt.

TO LABOR

To pitch and roll heavily under conditions which subject the ship to unusually heavy stresses caused by confused or turbulent seas or unstable stowage of cargo

ANGLE OF ROLL

The angle between the transverse axis of a craft and the horizontal. Also called ROLL ANGLE

DUAL-RATE BLANKING

To provide continuous service from one Loran C chain to the next, some stations are operated as members of two chains and radiate signals at both rates. Such a station is faced peri- odically with an impossible requirement to radiate two overlapping pulse groups at the same time. During the time of overlap, the sub- ordinate signal is blanked or suppressed. Blanking is accomplished in one of two ways: priority blanking in which case one rate is always superior or alternate blanking in which case the two rates alternate in the superior and subordinate roll

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