TH28735A - Methods of lock wrapping with different numbers of sheets? - Google Patents

Abstract

The sheet winding machine and the procedure for using it are disclosed. The machine consists of a turret assembly, a core packing machine, and a core ejecting machine. The turret assembly supports the drive shaft to rotate in coordination with the central core while winding the paper sheets onto it. Each core shaft is counted in a non-circular torsional trajectory. The core packing machine tilts the cores onto the core shafts as the core shafts move along the packing segments of the closed core shaft trajectory, and the core ejecting machine removes each individually wound core from each core shaft as the core shafts move along the ejecting segments of the closed core shaft trajectory. The turret assembly is continuously rotating and the number of sheets per lock can be changed while the turret assembly is rotating. The machine can also be equipped with core shafts with deformable core packing assemblies.

Claims (12)

1. The method of winding continuous sheets of material onto a hollow core to form individual locks, with different lengths of material wrapped around each lock, consists of the following steps: preparing a rotating turret assembly supporting multiple drive shafts for winding the material onto the supported cores; preparing a drive reel for transferring the material sheets to the rotating turret assembly; rotating the reel; rotating the turret assembly to steer the shafts into a closed trajectory; winding the material onto the supported cores to form a lock with a predetermined material length (first length); and changing the length of material to be wound onto the core while the turret assembly rotates to form a lock with a second predetermined material length (second length), where the first length differs from the second. 2. The procedure of claim 1 will also be further comprising a procedure of continuously rotating the turret assembly. 3. Methodology of Claim 2: The procedure for the continuous rotation of the turret assembly shall consist of a procedure for the continuous rotation of the turret assembly after the procedure for changing the length of the material to be wound onto the core has been completed. 4. The procedure of claim number 3, the continuous rotation procedure of the turret assembly, will also include a step of causing the turret assembly to rotate continuously before the step of changing the length of the material to be wound onto the core begins. 5. The procedure of claim 4 shall consist of the following steps: continuous rotation of the turret assembly with a constant angular velocity of one value while forming a selector of a predetermined material length of one size; and continuous rotation of the turret assembly with a constant angular velocity of a second value while forming a selector of a predetermined material length of a second size. 6. The method of winding continuous sheets of material onto a hollow core to form individual locks, with each lock having material of varying lengths wrapped around it, consists of the following steps: preparing a turret assembly that supports multiple drive shafts for winding the material onto the supported cores; preparing a drive reel for transferring the material to the turret assembly; rotating the drive reel; rotating the turret assembly to steer the shafts into a closed trajectory; winding the first length of material onto the supported cores to form a lock of that length; changing the rotational speed of the turret assembly in relation to the rotational speed of the drive reels while the turret assembly is rotating; and winding the second length of material onto the supported cores to form a lock of that length. A second length of material is added, where the second length differs from the first length. 7. The procedure for claim 6, the procedure for winding material onto the core, shall consist of: varying the winding rate of the shaft in accordance with Schedule 1 for winding material of length 1 onto the core; and varying the winding rate of the shaft in accordance with Schedule 2 for winding material of length 2 onto the core, where Schedule 2 differs from Schedule 1. 8. Methodology of Claim 6: The procedure for changing the rotational speed of the turret assembly in relation to the rotational speed of the support reel while causing the turret assembly to rotate shall consist of a phase alignment of the turret assembly relative to the position of the support reel within the locking loop. 9. Regulation of Claim 8: The procedure for aligning the turret assembly relative to the position of the support reel within the locking loop shall consist of the following steps: determining the locking loop via temporal adjustment as a function of the difference between the first and second lengths; determining the rotational position of the support reel within the locking loop via temporal adjustment; determining the actual position of the turret assembly relative to the rotational position of the support reel within the locking loop via temporal adjustment; determining the desired position of the turret assembly relative to the rotational position of the support reel within the locking loop via temporal adjustment; calculating the positional error for the turret assembly from its actual position and its desired position relative to the rotational position of the support reel within the locking loop via temporal adjustment; and minimizing the calculated positional error of the turret assembly. 10. The procedure for claim 6 shall consist of the following steps: continuous rotation of the turret assembly with a constant angular velocity of one value while forming a lock of the first length of material; and continuous rotation of the turret assembly with a constant angular velocity of a second value while forming a lock of the second length of material. 11. The method of winding continuous sheets of material onto a hollow core to form individual locks, with each lock having material of varying lengths extending around it, consists of the following steps: the preparation of at least two independently driven components, where the position of each independently driven component is mechanically disconnected from the positions of the other independently driven components, and at least one independently driven component consists of multiple rotating turret drive assemblies supporting the rotating drive shaft for winding onto the lock; the preparation of a rotating drive reel for transferring the sheet of material to the rotating drive reel assembly, where the position of the reel is mechanically disconnected from the positions of the independently driven components; the preparation of a programmable control system for controlling the positions of the independently driven components; and the preparation of memory accessible by the programmable control system. The winding speed schedules for the shaft (Schedule 1 and Schedule 2) are stored in memory accessible by the programmable control system. Schedule 1 corresponds to the first lock length of the material, and Schedule 2 corresponds to the second lock length of the material. This includes rotation of the support reel; independent driving of the driven components, with the turret assembly rotated to guide the shaft in a closed trajectory; variation of the shaft winding speed in accordance with Schedule 1 for winding the first lock length of the material; independent variation of the driven component speed in relation to the rotation speed of the support reel while the turret assembly is rotated; and variation of the shaft winding speed in accordance with Schedule 2 for winding the second lock length of the material. 12. The procedure for claim 11, the procedure for changing the rotational speed of the independently driven components in relation to the rotational speed of the support reel, shall consist of the following steps: aligning the phase positions of the independently driven components relative to the position of the support reel within the lock winding cycle.