Sapal Societe Anonyme Des Plieuses Automatiques

Societe Anonyme Des Plieuses Automatiques (sapal)

Endre Pongracz

In a wrapping machine a strip bearing repetitively markings and marks is cut up into sections for individual wrapping of articles such as slabs of chocolate. It is desirable to have available a correction in both directions, which is accurate over a wide margin, to avoid restrictions on the printing of the strip, and to allow continuous forward travel and a high rhythm. Circuits (100-120) validate a mark detection signal (LECTREP) while eliminating interference and irrelevant signals and evaluate the phase shifts between this signal (LECTREP) and a synchronization signal (SYNCHR) depending upon the machine. They establish a correction limited to a certain maximum. The correction acts upon a motor (1) which drives the strip. The maximum is such that the cut section remains usable, which avoids interruption, and leaves an article wrapped in this defective section for later elimination.

Method and devices for regulation of the forward travel of a strip

A wrapping machine has a plurality of movable elements which move in predetermined ways to perform a wrapping operation. Control of the movements of at least some of the elements is performed using a pulse generator for synchronization and a control circuit which receives the pulses from the pulse generator. The control circuit comprises a computer having a suitable working program and peripherals connected to the computer and operating the associated element. Each peripheral comprises a processor controlled by the computer and a step-by-step motor which is controlled by the processor and which is operatively connected to the associated element to move the element.

Wrapping machine

The present invention relates to a packaging material feeding device on a packaging machine with two winders. This system includes two driving servomotors 4, 34, winders 1, 31, a driving mechanism 24, 25 of the packaging material in the form of a strip, two coding devices 54, 56, and sensing devices 55, 57 which sense a signal corresponding to the instantaneous diameter of the activated packaging material reel and, in response thereto, supply a control signal for controlling the driving speed of these winders. The system also includes a press 17, 21 to automatically match the end of the strip of packaging material on the reel being unrolled to the beginning of the strip on the following reel.

Packaging material feeding device for a packaging machine

The present invention concerns a handling process for staging manufactured articles leaving a production unit and travelling towards a receiving machine, e.g. a packaging unit working at a preset speed, and a facility for putting this process into effect. Each object or group of objects leaving the production unit is so placed to match the requirements of the receiving machine and each following the other on an endless conveyor belt staged and phased at random in relation to the correct staging and phasing for the receiving machine's operating cycle, the dephasing of each article is measured in relation to a reference signal which defines the zero angle of the working cycle of the receiving machine, this reference signal immediately preceding detection of the said article, the instantaneous speed of the receiving machine is measured, each article is speeded up or slowed down in at least one regulating station in relation to the measured dephasing and the speed of the receiving machine, and the said article on leaving the regulating station is transferred to an endless conveyor belt travelling in synchronisation with the receiving machine. The purpose of the handling process and of the facility is to arrange the articles as they arrive in column and correctly aligned but with random staging and phase so that they can be conveyed to the packaging machine with the correct staging and phase, so that the proper operation of the machine is ensured.

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Ecublens, Switzerland

Endre Pongracz