Abstract: This invention relates to an apparatus (1) for processing an optical fiber unit, the apparatus comprising an extruder head (2) with an inlet (6) receiving an optical fiber unit (7) including at least one optical fiber (24) and an outlet (4) outputting with a tube speed a produced tube (3), and a capstan (25) receiving and passing on the produced tube (3), the produced tube contacting an outer periphery (19) of the capstan by extending around the capstan. In order to obtain a simple and reliable solution the apparatus comprises a feeding device (13) and a connection (8) to a fluid source (9).

Abstract: The invention relates to a device for processing optical fibers, comprising: a pair of pulleys (1, 2) arranged to receive in a space between them a first optical fiber element (4), and a drive mechanism. In order to obtain a device capable of efficiently and reliably processing optical fibers the first pulley (1) in the pair of pulleys comprises a circumferential first groove (5) in a circumferential contact surface (6) for receiving the first optical fiber element (4), the first groove (5) being shaped to accommodate the first optical fiber element (4) such that less than half of the cross sectional surface area of the first optical fiber element (4) protrudes out of the first groove (5), and a second pulley (2) in the pair of pulleys comprises a circumferential contact surface (7) contacting a surface of the first optical fiber element (4).

Abstract: The invention relates to a device for processing optical fibers, comprising: a pair of pulleys (1, 2) arranged to receive in a space between them a first optical fiber element (4), and a drive mechanism. In order to obtain a device capable of efficiently and reliably processing optical fibers the first pulley (1) in the pair of pulleys comprises a circumferential first groove (5) in a circumferential contact surface (6) for receiving the first optical fiber element (4), the first groove (5) being shaped to accommodate the first optical fiber element (4) such that less than half of the cross sectional surface area of the first optical fiber element (4) protrudes out of the first groove (5) , and a second pulley (2) in the pair of pulleys comprises a circumferential contact surface (7) contacting a surface of the first optical fiber element (4).