Roll paper feed device for printing machine

Roll paper feed device for a printing machine, comprising a cradle provided with side cheeks, supporting means situated at the lower part of the cradle and forming a cradle for supporting a paper roll such that said paper roll rests freely on said supporting means by its lower periphery and rotates freely on said supporting means whenever the free end of the paper web is subjected to a traction, this device additionally comprising braking means for said rotating roll, which are joined to said cradle and have at least one elastic bearing member against at least one side of the paper roll, wherein said elastic bearing member comprises at least one elastically deformable arm joined to the cradle and at least one protruding zone which is situated at the free end of said arm and which is engaged through an opening made in a side cheek of the cradle and protrudes relative to the inner face of said cheek, and

• wherein said protruding zone is in the form of a protruding stub, which comprises a substantially flat bearing surface suitable for bearing against a side of the roll and peripherally surrounded by an inclined surface suitable for sliding over the sides of the roll when this is introduced in the cradle.