Heating unit for heating package sleeves and apparatus comprising such a heating unit

An apparatus for filling packages having a heating unit for at least partially heating with hot air end areas to be sealed of package sleeves arranged on different mandrel wheels, having a sealing unit for closing and welding the end areas of the heated package sleeves arranged on different mandrel wheels in a liquid-tight manner and having a filling device for filling the package sleeves closed on at least one side, wherein the heating unit comprising a plurality of heating devices for at least partially heating with hot air end areas of package sleeves arranged on different mandrel wheels to be sealed, wherein the heating unit has an air supply device for supplying air to be heated to the heating devices, wherein the heating devices each have an electrical heating element for producing hot air and a nozzle unit for blowing hot air produced in the heating device against the end area of the package sleeve, wherein the heating devices are each separately connected to the air supply device by means of at least one holder and are each separately held on the air supply device by means of the at least one holder, wherein the at least one holder in each case has at least two separate channels connected to a distribution pipe of the air supply device for supplying air to be heated to the heating devices, wherein the heating devices are each separately held on the distribution pipe of the air supply device by means of the at least one holder, and wherein the distribution pipe is fluidly connected to the air supply device via a plurality of connection channels.