Abstract: The invention relates to a drier for printed strips, comprising a housing through which the printed strips are carried, means for supporting the strip, a feed means for feeding heated gas to the housing, a discharge means for discharging gas from the housing, and a recirculation device for recirculating the gas present in the housing during standstill of the strip, wherein the recirculation device has been adapted for maintaining recirculation parallel to the direction of movement of the strip. As a consequence of these features the temperature prevailing in the space in the housing is kept substantially uniform during standstill of the strip. By maintaining the operating temperature there is hardly any need for temperature increase to take place during the start-up procedure, so that this procedure will proceed quickly.

Abstract: A device for drying strips of printed material includes a drying chamber through which the strips of printed material are carried, the drying chamber being divided into at least two sections by walls and being as gas-tight as possible in relation to the environment, at least one burner connected to the drying chamber by an outlet duct for discharging at least a portion of combustion gases and connected to the drying chamber by a feed duct for feeding to the burner gases saturated with solvents and structure for feeding fresh air to a first of the at least two sections being located at a first outer end of the drying chamber. The feed duct is connected to a second of the at least two sections.

Abstract: Apparatus and method for joining, while stationary, an expiring web to a new web in such a way that the joined webs lie in one plane. To this end, the new web and the expiring web are brought together and are simultaneously cut through along one cutting line. Subsequently, at least on one side, a bonding strip is applied over the web parts to be joined. The beam-shaped unit has a first contact surface for the new web. In line therewith and on the same side of the travel path, a second contact surface is arranged for the expiring web. That part of the new web which is located downstream of the cutting line, is situated at a distance from the expiring web. By retaining each of the web parts to be joined against an associated contact surface, it is possible to achieve an accurate join.

Abstract: A burner unit for heating a gaseous medium includes a heat exchanger provided with tubes, a space between the tubes connected on the upstream side to a feed duct for the gaseous medium; a combustion chamber connected to the downstream side of the space between the tubes; a burner placed in the combustion chamber; and a fuel supply duct connected to the burner. The side of the combustion chamber remote from the heat exchanger is connected to a first end of the tubes; and a flue gas outlet duct is connected to the other end of the tubes. The elongation of the tubes forming part of the heat exchanger renders the use of a conventional tube plate superfluous. Thus, damage resulting from thermal stresses is avoided.