FEEDING DEVICE OF SHEET MATERIAL AND METHOD OF CONNECTION OF MATERIAL PARTS Russian patent published in 2014 - IPC B65H19/18 

FIELD: packaging industry.

SUBSTANCE: group of inventions relates to the field of packaging machines. The device of feeding from coils of sheet material comprises two unwinding shafts and suction, cutting and welding devices. On the shafts the coils with the material are located. The shafts are made with the ability to feed material from the coils in the direction of suction, cutting and welding devices. The suction, cutting and welding devices are made with the ability to be moved to approach and deviate from one another. Each unit is formed by group of composed modules of suction and cutting. At least two modules are provided with guide elements for the cutting means. The possibility is provided to select the modules and change their number in accordance with the desired height of welding. By connecting the initial part of the material of the filled coil with the end part of the material of the terminating coil the cutting and welding are synchronized in accordance with the amount of unwound material, and the readout signal of the positioning marks.

EFFECT: ability to change the coils is achieved without loss of material feeding rate.

16 cl, 22 dwg