A sheet manufacturing apparatus includes a drum unit having a plurality of openings, a housing unit covering the drum unit, a transport unit on which a material containing fibers passing through the openings is accumulated as a web and which transports the accumulated web, a first roller that abuts the web transported by the transport unit, and a first seal unit that is provided on a first side wall of the housing unit and comes into contact with the first roller.

A sheet manufacturing apparatus includes a drum unit having a plurality of openings, a housing unit covering the drum unit, a transport unit on which a material containing fibers passing through the openings is accumulated as a web and which transports the accumulated web, a first roller that abuts the web transported by the transport unit, and a first seal unit that is provided on a first side wall of the housing unit and comes into contact with the first roller.

The device for the guided transport of a card web comprises a card web transport having an endless outside surface for conveying the card web in a conveying direction, and a guide element, which is arranged opposite a section of the outside surface of the card web transport and facing the outside surface of the card web transport, has a surface profile which comprises a plurality of elevations and depressions alternating in a direction transverse to the conveying direction. The elevations and depressions extend in the conveying direction of the card web. The elevations form guide surfaces for the guidance of the card web and the depressions form vent grooves for conducting away the entrained air carried along by the card web. The guide element is concavely curved in the conveying direction, and the elevations point radially inward.

The device for the guided transport of a card web comprises a card web transport having an endless outside surface for conveying the card web in a conveying direction, and a guide element, which is arranged opposite a section of the outside surface of the card web transport and facing the outside surface of the card web transport, has a surface profile which comprises a plurality of elevations and depressions alternating in a direction transverse to the conveying direction. The elevations and depressions extend in the conveying direction of the card web. The elevations form guide surfaces for the guidance of the card web and the depressions form vent grooves for conducting away the entrained air carried along by the card web. The guide element is concavely curved in the conveying direction, and the elevations point radially inward.

The device for conveying a fiber web comprises a transport device, which serves as a support for the fiber web, and which is driven by a drive in a transport direction at a speed of at least 50 m/min. The transport device has a rough surface and carries along the fiber web resting on the transport device by force of friction. An array of linear elements arranged above the transport device serves to cover the fiber web resting on the transport device. The linear elements have a smooth surface, and the fiber web is carried along the bottom surface of the linear elements. The linear elements are arranged next to each other but spaced apart in a direction transverse to the transport direction.

The device for conveying a fiber web comprises a transport device, which serves as a support for the fiber web, and which is driven by a drive in a transport direction at a speed of at least 50 m/min. The transport device has a rough surface and carries along the fiber web resting on the transport device by force of friction. An array of linear elements arranged above the transport device serves to cover the fiber web resting on the transport device. The linear elements have a smooth surface, and the fiber web is carried along the bottom surface of the linear elements. The linear elements are arranged next to each other but spaced apart in a direction transverse to the transport direction.

The device for the guided transport of a card web comprises a card web transport having an endless outside surface for conveying the card web in a conveying direction, and a guide element, which is arranged opposite a section of the outside surface of the card web transport and facing the outside surface of the card web transport, has a surface profile which comprises a plurality of elevations and depressions alternating in a direction transverse to the conveying direction. The elevations and depressions extend in the conveying direction of the card web. The elevations form guide surfaces for the guidance of the card web and the depressions form vent grooves for conducting away the entrained air carried along by the card web. The guide element is concavely curved in the conveying direction, and the elevations point radially inward.

A compensating device (1) for fluctuating transport speeds of a fiber nonwoven (3). The compensating device (1) has a buffer belt (2) driven in a loop with three or four or more deflection points (12, 13, 14, 15, 16) and with a variable sag (11) of the carrying run supporting the fiber nonwoven (3). The compensating device (1) further has an adjusting element (19) for adjusting the location of at least one deflecting point (15, 16).

A sheet manufacturing apparatus includes: a first transport unit that causes a first transport belt to circle around so as to transport a web; and a second transport unit that is disposed with a part thereof shifted from the first transport unit toward the downstream side in a transport direction of the web, sucks the web in a direction in which the web is spaced from the first transport belt, and transports the web. The second transport unit includes a suction chamber which is positioned on an inner side of a second transport belt circling around and of which an inner space is sucked by a suction unit such that the web is adsorbed onto the second transport belt. The suction unit is positioned on the outer side of the second transport belt in a direction orthogonal to the transport direction of the web along the surface of the web.

The device for conveying a fiber web comprises a transport device, which serves as a support for the fiber web, and which is driven by a drive in a transport direction at a speed of at least 50 m/min. The transport device has a rough surface and carries along the fiber web resting on the transport device by force of friction. An array of linear elements arranged above the transport device serves to cover the fiber web resting on the transport device. The linear elements have a smooth surface, and the fiber web is carried along the bottom surface of the linear elements. The linear elements are arranged next to each other but spaced apart in a direction transverse to the transport direction.