Reeling-up drum

Claim 2

An improved reeling-up drum of the kind intended to retain the winding sleeve supporting paper rolls and similar material wound onto sleeve-like cores, comprising grooves formed in the reeling-up drum, expansible means in the form of hoses inserted in said grooves, an axial channel formed in one of the two trunnions of said reeling-up drum, junction channels interconnecting said hoses and said axial channel, and a pressure element positioned in each one of said grooves, said hoses being arranged, when inflated by pressurized air supplied through said axial channel and said junction channels, to displace said pressure elements radially outwards into engagement with the inner circumfeRence of said winding sleeve, a body of resilient material displaceable in said reeling-up drum axial channel, and a rod-like pressure member adapted to move and expand said resilient body to effect closure of said junction channel mouths into said axial channel.

Claim 3

An improved reeling-up drum as claimed in claim 1 wherein the rod-like pressure member contains an axial air supply channel and which channel debouches at the periphery of said pressure member.

Claim 4

An improved reeling-up drum as claimed in claim 1 comprising a non-return valve formed at the outer end of said rod-like pressure member, said non-return valve being adapted to close at the occurrence of an internal excess pressure in said hoses.

Claim 5

An improved reeling-up drum as claimed in claim 1 further including spring means, said closure body being arranged to be urged by said rod-like pressure member against the action of spring means and into a position wherein said junction channels are exposed.

Claim 6

An improved reeling-up drum of the kind intended to retain the winding sleeve supporting paper rolls and similar material wound onto sleeve-like cores, comprising grooves formed in the reeling-up drum, expansible means in the form of hoses inserted in said grooves, an axial channel formed in one of the two trunnions of said reeling-up drum, junction channels interconnecting said hoses and said axial channel, and a pressure element positioned in each one of said grooves, said hoses being arranged, when inflated by pressurized air supplied through said axial channel and said junction channels, to displace said pressure elements radially outwards into engagement with the inner circumference of said winding sleeve, means displaceable in said reeling-up drum axial channel, said means being arranged upon its displacement in one direction to close the inner end of all said radially extending junction channels, said junction channels, leading to said hoses, departing from said axial channel, said closure means consisting of a body of resilient material inserted into said channel, a rod-like pressure member being provided to expand said resilient body into engagement with and to effect closure of said junction channel mouths into said channel, a chamber formed in said reeling-up drum, a piston provided in said chamber on said rod-like pressure member, a spring means arranged axially outside of said piston in said chamber, said piston being arranged to move axially outwards upon application of pressurized air into said chamber, whereby said closure body effects exposure of said junction channel mouths, and to move axially inwards through the action of said spring whereby said closure body effects closure of said junction channel mouths.

Claim 7

An improved reeling-up drum of the kind intended to retain the winding sleeve supporting paper rolls and similar material wound onto sleeve-like cores, comprising grooves formed in the reeling-up drum, expansible means in the form of hoses inserted in said grooves, an axial channel formed in one of the two trunnions of said reeling-up drum, junction channels interconnecting said hoses and said axial channel, and a pressure element positioned in each one of said grooves, said hoses being arranged, when inflated by pressurized air supplied through said axial channel and said junction channels, to displace said pressure elements radially outwards into engagement with the inner circumference of said winding sleeve, means displaceable in said reeling-up drum axial channel, said means being arranged upon its displacement in one direction to close the inner end of all said radially extending junction channels, said junction channels, leading to said hoses, departing from said axial channel, said closure means consisting of a body of resilient material inserted into said channel, a rod-like pressure member being provided to expand said resilient body into engagement with and to effect closure of said junction channel mouths into said channel, a chamber formed in said reeling-up drum, a piston provided in said chamber on said rod-like pressure member, a spring means arranged axially outside of said piston in said chamber, said piston being arranged to move axially outwards upon application of pressurized air into said chamber, whereby said closure body effects exposure of said junction channel mouths, and to move axially inwards through the action of said spring whereby said closure body effects closure of said junction channel mouths.

Claim 8

An improved reeling-up drum as claimed in claim 5, wherein an air inlet aperture is formed in the wall of said chamber, said air inlet aperture being formed at a point located axially inside of said piston in the axially inner position of displacement of said piston.