Feeding device for feeding suction air or blowing air to sheet-retaining device displaceable to machine element in sheet-processing machine, has first and second hollow tubes

摘要

A feeding device for feeding suction air or blowing air to sheet-retaining device displaceable to machine element in sheet-processing machine, has first hollow tube connected in terms of flow to air source for suction-air or blowing-air; and second hollow tube cooperating telescopically with first hollow tube for forming air through-passage duct connected in terms of flow to sheet-retaining device.