A link (118) extends between the auxiliary deflection roll (28') and a second small roll which is vertically adjustable by an adjusting mechanism (108).

A link (118) extends between the auxiliary deflection roll (28') and a second small roll which is vertically adjustable by an adjusting mechanism (108).

The sheet drive includes pairs of coacting rollers with each pair comprising a driven roller (56, 67) connected to the drive assembly and a free-wheeling roller (54, 65) that is adjustably mounted relative to its associated driven roller.

The roller slide (104a, 104b) includes a recess (130) and the at least one adjustable bushing (114) is at least partially disposed within the recess (130).

This is achieved by mounting the roller (1) in a yoke (2) fitted with an axle (3) mounted adjustably in a special beam (5).

A roller insert assembly (20) is installed within a cooling bed (22) having longitudinal members (24) and transverse members (26).

For this purpose, at least one of the rollers (3) is adapted to be height-adjusted relative to the wall element or the door (1) in a substantially vertical direction.

The roller includes a shaft about which the roller rotates.

The roller body may include a first roller tread (154) disposed between a first end of the roller body and a second end of the roller body.

Alternatively, the contact roll is in the form of a composite cylindrical roll which has a shape of a combined larger-diameter roll and a small-diameter roll.

The roller is rotatably attached to the roller support frame for rotation about a roller axis.

The upper, inner cam follower has an upper locking means for coupling the upper, inner cam follower and the outer cam follower.

First roller is pivotally connected to a roller arm; the roller arm extends perpendicularly to lifting rod.

The lower, inner cam follower has a lower locking means for coupling the lower, inner cam follower to the outer cam follower.

A stationary roll support and at least one movable roll support are provided.