Smoothing Press (SP)

A Smoothing Press, Schaefer model SP, is a rotary lamination press (nip rolls) used to squeeze an adhesive coated sheet to a substrate. It is designed for lamination of labels or sheets of material to substrates such as corrugated, chipboard and foam core board.

This rotary lamination press has a fixed lower roller and a floating upper pinch roll. The pinch roll is designed to provide enough pressure to squeeze out bubbles, blisters, and wrinkles trapped between the substrates, giving a high quality lamination. The nip pressure between the rolls is created by the weight of the pinch roller, and is about 2 lbs per linear inch. The pressure between the nip rolls is sufficient to squeeze air bubbles out of the layers of the lamination, but does not exert excessive pressure that would crush the flutes on corrugated or collapse foamcore board.

The floating pinch roll can follow variations in substrate thickness while maintaining consistent nip roll pressure. Both nip rolls are powered to provide positive pulling force and to eliminate any slippage between the layers of the lamination. The nip rolls are covered with urethane rubber for a positive grip and to conform to surface imperfections in the lamination substrates. Rolls can be separated for cleaning or shutdown periods. Initial opening between the rolls is adjustable.

The smoothing press is powered by a D.C. variable speed drive. Top speed is approximately 60 feet per minute, but it can also be operated at lower speeds to match the output of adjoining machinery.

Four versions of the smoothing press are available, with different maximum openings between the nip rolls. These are the standard SP, the SP3, the ACP, and the SPL. Details on each of these are on the adjoining pages.


Durable urethane covered rollers – 45 – 50 “A”
Both rolls driven to eliminate slippage of parts
Variable speed DC drive
Adjustable initial opening between rolls
Floating pinch roll eliminates compression of

Lamination of materials up to 1 ¼” thick
Powder coated finish


Substrate for lamination is placed on the in-feed table
Front edge of glued sheet is set in place on substrate
Combined sheets are moved forward until the rolls
pinch them

Rollers pull sheets through do laminating at the
same time

Weight of the pinch roll will squeeze out wrinkles,
blisters and bubbles


The smoothing press can be modified for many different types of lamination work. Some of the options and special designs available:

​Welded stands with locking casters
Metal rolls
Silicone rubber or other types of roller surfaces
Rolls with special hardness coverings
Larger openings
Custom widths
Air cylinders for added squeeze pressure
Larger motors available for use as pull rolls
Special voltages
Alternate motor locations
Spring loading for pinch roll
Digital roll height indicators