Guide rail for a window lift and door system for a vehicle door

A door system for a vehicle door with a carrier and at least two guide rails of a window lifter for lifting and lowering a window pane along an adjusting travel path integrated into the carrier, wherein each of the two guide rails is arranged on a base plate of the carrier and is configured to guide an adjusting part of the window lifter coupled to the window pane along an adjusting direction predetermined by the at least two guide rails,

• wherein each of the at least two guide rails is, at least in sections, twisted or bent and comprises a base as well as a guide leg and a leg which protrude from longitudinal side edges of the base at obtuse draft angles with respect to the base,
• wherein a size of the draft angles is proportional to the bending or twisting of the base plate or the respective guide rail predetermined by the adjusting travel path of the window pane,
• wherein the guide rails are aligned parallel to each other,
• wherein the carrier comprises a recess for receiving a component of the window lifter, the recess being formed into the carrier,
• wherein the guide leg and the leg of a respective guide rail protrude from the longitudinal side edges of the base at a profile angle γ in respect to the base normal, wherein said profile angle meets the requirement
• γ≧α+β±Ω,
• wherein α and β are the twisting angles of the guide rails at an upper and lower end of the guide rails with respect to a reference plane tangent to and extending between the bases of the at least two guide rails at a location between the upper and lower ends of the respective guide rail and Ω is an inclination angle with which side walls of the recess are inclined to a normal of the reference plane.