Provided is a paper roll production apparatus that saves installation space and enables production of paper rolls of different qualities and a shortening of production time. The paper roll production apparatus includes: a sheet-forming and dewatering part 5 forming paper stock into a sheet and for dewatering the paper stock; a drying machine 6 drying the paper stock dewatered by the sheet-forming and dewatering part 5 to form a dry paper material; a switching mechanism part switching to feed, into the drying machine 6, the paper stock dewatered by a first sheet-forming machine included in the sheet-forming and dewatering part 5 or the paper stock dewatered by a second sheet-forming machine included in the sheet-forming and dewatering part 5; and a winder 8 winding up the dry paper material provided by the drying machine 6 to form a paper roll. The first sheet-forming machine operates at a sheet-forming speed at which a fiber orientation of the paper stock is maintained. The second sheet-forming machine operates at a sheet-forming speed faster than the sheet-forming speed of the first sheet-forming machine. The winder 8 winds up the dry paper material at a speed corresponding to the sheet-forming speed of the first sheet-forming machine or to the sheet-forming speed of the second sheet-forming machine to form the paper roll material.

Provided is a paper roll production apparatus that saves installation space and enables production of paper rolls of different qualities and a shortening of production time. The paper roll production apparatus includes: a sheet-forming and dewatering part 5 forming paper stock into a sheet and for dewatering the paper stock; a drying machine 6 drying the paper stock dewatered by the sheet-forming and dewatering part 5 to form a dry paper material; a switching mechanism part switching to feed, into the drying machine 6, the paper stock dewatered by a first sheet-forming machine included in the sheet-forming and dewatering part 5 or the paper stock dewatered by a second sheet-forming machine included in the sheet-forming and dewatering part 5; and a winder 8 winding up the dry paper material provided by the drying machine 6 to form a paper roll. The first sheet-forming machine operates at a sheet-forming speed at which a fiber orientation of the paper stock is maintained. The second sheet-forming machine operates at a sheet-forming speed faster than the sheet-forming speed of the first sheet-forming machine. The winder 8 winds up the dry paper material at a speed corresponding to the sheet-forming speed of the first sheet-forming machine or to the sheet-forming speed of the second sheet-forming machine to form the paper roll material.

A method of operating an off-line finishing device for fiber webs, in particular an off-line slitter-winder for winding fiber webs, wherein in operating the off-line device the running speed is automatically optimized to minimize cost of web breaks. The method considers the costs associated with a web break during unwinding in addition to the cost benefit of maximizing web unwind speed so as to maximize machine utilization. The method determines an optimal web break stopping time in a web break situation and how often a web break is predicted. Automatic optimization incorporates limitations including the maximum rotation speed of the parent roll, the maximum speed of the fiber web being unwound, the maximum positive torque which can be applied to the parent roll to accelerate the parent roll to a rotation rate which produces a desired web speed, and maximum braking torque.

A method of operating an off-line finishing device for fiber webs, in particular an off-line slitter-winder for winding fiber webs, wherein in operating the off-line device the running speed is automatically optimized to minimize cost of web breaks. The method considers the costs associated with a web break during unwinding in addition to the cost benefit of maximizing web unwind speed so as to maximize machine utilization. The method determines an optimal web break stopping time in a web break situation and how often a web break is predicted. Automatic optimization incorporates limitations including the maximum rotation speed of the parent roll, the maximum speed of the fiber web being unwound, the maximum positive torque which can be applied to the parent roll to accelerate the parent roll to a rotation rate which produces a desired web speed, and maximum braking torque.

Method for predicting the presence of product defects during an intermediate processing step of a thin product wound in a roll, which provides for—receiving a roll of thin product that has been assigned a unique identification code stored in a database system, this latter containing process and/or product parameters detected in the production steps of said thin product wound in said roll upstream of said intermediate processing step, associated with said unique identification code,—accessing said database system,—entering one or more of the process and/or product parameters associated with the unique identification code of said roll contained in said database system in a predictive model, which uses a correlation, created by means of machine learning logics, from historicized values related to the process and/or product parameters output from said intermediate processing step and historicized values related to process and/or product parameters of the same rolls detected in the production steps of said rolls upstream of said intermediate processing step, in order to predict product parameters output from said intermediate processing step,—comparing said aforesaid product parameters with respective predefined limit values,—generating predictive diagnosis information of thin product defects based on the result of said comparison.

Method for predicting the presence of product defects during an intermediate processing step of a thin product wound in a roll, which provides for—receiving a roll of thin product that has been assigned a unique identification code stored in a database system, this latter containing process and/or product parameters detected in the production steps of said thin product wound in said roll upstream of said intermediate processing step, associated with said unique identification code,—accessing said database system,—entering one or more of the process and/or product parameters associated with the unique identification code of said roll contained in said database system in a predictive model, which uses a correlation, created by means of machine learning logics, from historicized values related to the process and/or product parameters output from said intermediate processing step and historicized values related to process and/or product parameters of the same rolls detected in the production steps of said rolls upstream of said intermediate processing step, in order to predict product parameters output from said intermediate processing step,—comparing said aforesaid product parameters with respective predefined limit values,—generating predictive diagnosis information of thin product defects based on the result of said comparison.

A dunnage conversion system includes a machine for converting a stock material into a strip of relatively lower-density dunnage, a coiling mechanism for winding the strip into a coil, a taping mechanism for automatically securing a trailing end of the strip to the coil, and a coil ejecting mechanism for automatically removing the coil from the coiling mechanism. The taping mechanism includes a guide surface between an outlet of the machine and the coiling mechanism to guide the strip to the coiling mechanism and to guide tape for engagement with a trailing end of the strip and to secure the trailing end of the strip to the coil. The coil ejecting mechanism includes a lever arm that pivots to push the completed coil off the coiling mechanism.

A dunnage conversion system includes a machine for converting a stock material into a strip of relatively lower-density dunnage, a coiling mechanism for winding the strip into a coil, a taping mechanism for automatically securing a trailing end of the strip to the coil, and a coil ejecting mechanism for automatically removing the coil from the coiling mechanism. The taping mechanism includes a guide surface between an outlet of the machine and the coiling mechanism to guide the strip to the coiling mechanism and to guide tape for engagement with a trailing end of the strip and to secure the trailing end of the strip to the coil. The coil ejecting mechanism includes a lever arm that pivots to push the completed coil off the coiling mechanism.

A winding apparatus is disclosed for winding material around a core of flat shape rotated around a rotation axis carried by a crank that is in turn carried by another crank, the three rotation axes of the core and of the two cranks being motorized independently by respective electric cams, with three distinct laws of motion programmed to cancel the variations in position and speed of the material entering the core. The winding apparatus is used for the production of electric energy storage devices.

A winding apparatus is disclosed for winding material around a core of flat shape rotated around a rotation axis carried by a crank that is in turn carried by another crank, the three rotation axes of the core and of the two cranks being motorized independently by respective electric cams, with three distinct laws of motion programmed to cancel the variations in position and speed of the material entering the core. The winding apparatus is used for the production of electric energy storage devices.