摘要:
A method for cutting lidstock units from a web of pre-printed lidstock, the steps of: a) providing a web of pre-printed lidstock comprising a plurality of lidstock units across its width and its length and provided with a plurality of registration marks, b) feeding the web in the direction of its length through a cutting region provided with a first and a second optical sensor, c) stopping the feeding of the web when the first optical sensor detects a registration mark, d) moving the web in the direction of its width until a second optical sensor detects the registration mark, e) cutting the web in the cutting region into lidstock units by means of cutters.
摘要:
An object of the present invention is to provide a welding system wherein the positional accuracy of welding and the quality of welding are improved. The present welding system includes an ultrasonic welder for welding a plurality of webs W together while carrying the webs W. The ultrasonic welder includes: an anvil roller 10 including a pair of anvils 11, 12; a first ultrasonic horn 21 and a second ultrasonic horn 22 that apply vibration energy to the webs W in cooperation with the pair of anvils 11, 12. The pair of anvils 11, 12 are provided symmetrically with each other with respect to an axis line O of the anvils roller 10. The first and second ultrasonic horns 21, 22 apply the vibration energy to the webs W simultaneously while each of the anvils 11, 12 faces the first or second ultrasonic horn 21, 22.
摘要:
A method for controlling cut-off registration in a printing press having printed webs includes applying print control marks which are invisible to the human eye to the printed webs; passing the webs pass through cut-off register control actuators; assembling the webs into a bundle for cut-off; scanning the webs with sensors to determine the actual positions of the marks; comparing the actual positions with desired positions of the marks; and generating signals for the cut-off register control actuators based on the comparison.
摘要:
A register in a printing machine is controlled and adjusted by providing at least one printing unit provided with at least two printing groups in the printing machine. Each printing group comprises a cylinder pair consisting of at least a forme cylinder and a transfer cylinder. The forme cylinder of the first printing group is phase shifted at a first amount for the register adjustment in a circumferential direction. The transfer cylinder of the first printing group is phase shifted in a second amount in the circumferential direction. The amount of the phase shift of the forme cylinder is different from the amount of phase shift of the transfer cylinder. The two amounts of the phase shifts are not equal to zero.
摘要:
A method for automatically controlling the cut-off register in a web-fed rotary press includes determining an expected cut-off error in the area of harps for one of webs or partial webs before the formation of strands and automatically controlling the cut-off register of the one of the webs or partial webs by rotating plate cylinders involved in the printing of the respective web or partial web on the basis of the expected cut-off error thus determined for each web or partial web. The method further includes determining an expected cut-off error in the area of the folder upper section for at least some strands before a complete strand is formed, and automatically controlling the cut-off register by displacement of register rollers located downstream of the former in which the at least some strands are quarter-folded on the basis of the expected cut-off error thus determined for the at least some strands.
摘要:
A web processing assembly including first, second and third fixed spaced apart pairs of nip rollers moving the web respectively at a first, second and third speeds, the first and third speeds being constant and similar, the second speed being variable with a mean speed similar to the first and third speeds, a first idler roller engaging the web between the first and second pair of rollers and a second idler roller engaging the web between the second and third pair of rollers, each idler roller maintaining the web in constant tension by moving along a restrained path perpendicular to its axis to compensate for a difference between the variable second speed and the respective one of the constant first and third speeds. A method for processing a web and system for conveying a web are also disclosed.
摘要:
Systems and methods for providing alarming indications and troubleshooting indications and actions in connection with a web converting manufacturing process such as that used for manufacturing disposable absorbent garments. Some of the disclosed embodiments include relating inspection data, such as product (or process) attribute data, to data from other manufacturing-related systems. Also disclosed are systems and methods for linking product (or process) attribute data obtained during the manufacturing process with one or more data sources including raw material data, process setting data, product quality data, and/or productivity data. Also disclosed are systems and methods for identifying manufacturing set point changes and automatically implementing such changes and automated web steering changes based on data from one or more inspection systems.
摘要:
An apparatus and process for making sheets having indicia spaced in a machine direction. Between or among the indicia are perforations or chop-off cuts. The spacing, in the machine direction, between the indicia and perforations or chop-off cuts is maintained over long sheet lengths. The product produced using this apparatus and process is typically paper, and particularly can be used for paper towels or placemats.
摘要:
A method for setting the cut register in a web-fed rotary press includes assigning a cut register function to a predetermined speed function, wherein the predetermined speed function describes a time curve of an operating speed of the rotary press starting from a predetermined initial value and the cut register function describes a time curve of the set value of the cut register, and changing the set value of the cut register continuously and synchronously in accordance with the associated cut register function during a variation in the operating speed of the rotary press according to the predetermined speed function, the cut register function being chosen empirically such that it counteracts a change in the actual value of the cut position as a result of the change in the operating speed.
摘要:
In order to control the cut register of a web (1) in a web-fed rotary press, a pulling device (Z3) which transports the web (1) is changed with regard to its circumferential speed.