Reel wound roll load sensing arrangement

A paper web reeling apparatus, including a pair of primary arms for receiving a core and a driven support drum having a surface and an axis of rotation for supporting the traveling paper web when the core is held in the primary arms and brought into nipping engagement with the support drum with the web therebetween to wind the web into a wound web roll on the core, the combination comprising:

• the pair of primary arms are mounted co-axially with the support drum to rotate substantially co-axially with the support drum and to extend substantially radially of the axis of rotation;
• nip force control means operatively associated with the primary arms for receiving and holding a core in movable adjustably biased nipping engagement with the support drum, the core being substantially arcuately movable about an upper segmental portion of the support drum surface to commence the winding of the web onto the core to form a partially wound web roll thereon;
• first pressure sensing means operatively associated with the primary arms and nip force control means for sensing the weight of the core and any frictional force of the nip force control means in movement away from the support drum when the nip load between the core and support drum is adjusted to a desired level initially when the fresh core is positioned in the primary arms substantially vertically above the support drum, as well as any frictional force by the nip force control means as it moves to accommodate an increasing diameter of the wound web roll, said first pressure sensing means providing a first signal indicative of such core weight and frictional force as the web is wound on the core and the diameter of the wound web roll increases;
• second pressure sensing means associated with the support drum for only measuring any horizontal force on the support drum including any horizontal component of a radial force of the core or partially wound web roll against the support drum and providing a second signal indicative of the horizontal nip force against the support drum;
• angle position indicator means for measuring the angular position of the newly started core about the support drum axis of rotation and relative to the support drum surface, and for providing a third signal indicative of such position;
• signal processor means for receiving the first, second and third signals, and for introducing the signals as data into a program in a central processor and for providing a first control signal determined by the program to the nip force control means to control the nip pressure between the core, the web roll wound thereon, and the support drum according to the program as the partially wound web roll is moved by the pair of primary arms about an upper segment of the support drum such that the paper web is supported on a segment of the support drum surface while being held by the nip force control means;
• web tension measuring means disposed to measure the web tension of the on-coming paper web upstream of the web supported on the support drum, said web tension measuring means including a load cell for providing a fourth signal as a function of web tension;
• said signal processor means receiving the fourth signal and comparing it with the second signal to provide a second control signal indicative of the net reaction force on the support drum due to the horizontal force component of the partially wound web roll against the support drum less the horizontal force component of the tension force of the on-coming web;
• whereby the nip force control means controls the nip load between the web roll being wound and the support drum as a function of the first and second control signals.