초록 ▼

Packaging apparatus for packaging units in flexible sheet material with the units spaced longitudinally in a tube formed of a web of the material and with the tube sealed together between successive units. The apparatus includes a rotary sealing wheel carrying a series of sealing assemblies for seal

Packaging apparatus for packaging units in flexible sheet material with the units spaced longitudinally in a tube formed of a web of the material and with the tube sealed together between successive units. The apparatus includes a rotary sealing wheel carrying a series of sealing assemblies for sealing the tube, the sealing assemblies being uncoupled from the wheel and held at a hold position for again being released in timed relation to movement of the tube for sealing the tube between successive units. The apparatus also includes an electronic pulse counter or encoder driven at a speed proportional to the speed of the wheel to effect the release of a sealing unit in the event the passage of a unit to be packaged is not sensed by a photoelectric sensor when packaging the units in unprinted sheet material, or to control the placement of units to be packaged on a web of the material having registration marks preprinted thereon.

대표청구항 ▼

Apparatus for packaging units in flexible sheet material wherein the units are spaced longitudinally in a tube of said material and the apparatus has means for sealing the tube between the units, said sealing means comprising: a wheel rotatable or an axis; a series of sealing units carried by the wh

Apparatus for packaging units in flexible sheet material wherein the units are spaced longitudinally in a tube of said material and the apparatus has means for sealing the tube between the units, said sealing means comprising: a wheel rotatable or an axis; a series of sealing units carried by the wheel; each sealing unit having means for coupling it to the wheel for travel therewith and adapted for uncoupling of the sealing unit from the wheel to allow the wheel to rotate while the sealing unit remains stationary; means for arresting a first sealing unit at a hold position and for actuating its coupling means to uncouple said sealing unit from the wheel, said arresting means being movable between an operative position in which it is engageable by said coupling means of said first sealing unit to arrest said first sealing unit and to uncouple it from the wheel and a retracted position for release of the sealing unit to travel with the wheel, said arresting means being movable from its operative to its retracted position in response to a signal; means for generating said signal in response to passage of a unit by a reference point so as to couple the first sealing unit to the wheel in timed relation to movement of the units with the tube for sealing the latter between successive units; and backup means for generating said signal in response to movement of said wheel through a distance greater than a predetermined distance for the units being packaged in the event said generating means fails to sense the passage of a unit by said reference point, said backup means being reset prior to generating said signal by the release of a sealing unit in response to generation of said signal by said generating means, said backup means comprising means for generating a number of pulses corresponding to the wheel moving through a unit length, and means for counting said pulses and for generating said signal upon counting a specified number of pulses corresponding to said distance greater than said predetermined distance for the units.