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US 2018/0178574 A1Published application
Composite Doctor Blade Chamber
AssigneeTresu A/S
InventorJan Kjær Larsen
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AssigneeTresu A/S
InventorJan Kjær Larsen
Estimating the term…
A composite doctor blade chamber (1) for a doctor blade chamber system for rotary printing units, the doctor blade chamber (1) including a front side with an open channel (8), wherein the doctor blade chamber is made of two composite profiles, an open profile (30) with a front side and a back side and a closed profile (33) with a front side and a back side, wherein the front side (31) of the open profile is joined with the back side of the closed profile (35), whereby is achieved low weight and high strength, high corrosion resistance, a cleaning-friendly surface, less waste of ink, nice appearance and an improved working environment. In addition it is an object of the invention to provide a doctor blade chamber system with the above mentioned advantages where re placement of doctor blades can be performed faster, more easily and without use of tools.
A method for making a composite doctor blade chamber that includes two composite profiles, wherein the method at least comprises the following step, wherein an open profile with a front side and a back side and a closed profile with a front side and a back side are joined between front side of the open profile and the back side of the closed profile.
A doctor blade chamber system for rotary printing units, including a doctor blade chamber, a clamping rail and a doctor blade, wherein the doctor blade chamber is a composite doctor blade chamber, and where the doctor blade is clamped between the clamping rail and the composite doctor blade chamber, the clamping action being provided by an elongated profiled rail with a first side engaging a groove in the clamping rail, preferably a T-shaped groove, and with a second side engaging a groove in the composite doctor blade chamber, preferably a T-shaped groove, wherein a resilient element displaces the profiled rail in the groove of the doctor blade chamber inwards in direction of the bottom of the doctor blade chamber groove, the resilient element including elastic foam provided between a wall of the doctor blade chamber groove, the wall being opposite the bottom of the doctor blade chamber groove, and the profiled rail, such that the foam by expansion urges the profiled rail in direction towards the bottom of the doctor blade chamber.
Dependencies are inferred from the claim text.