
Disclosed is a new drum holder adapted to receive upon its peripheral cylindrical surface a snug wrapping of a removable sheet material and adapted to substantially continually take up slack as generated in the wrapping during rotation of the holder in use applications. The holder comprises a drum rotatable about its axis, with axially-parallel elements as part of the drum. Those elements include a tightening key chamber, tightening key, and a passage from the key chamber to a slit in the periph...











