US 2002/0162305 A1 · Lateral sealing mechanism for bag making and packaging machine, and bag making and packaging machine

Abstract

A lateral sealing mechanism for use in a bag-making and packaging machine includes movable rotary shafts. The movable rotary shafts are driven by a lateral drive mechanism so that the distance between the shafts is controllable. Support mechanisms are mounted on and rotatable about the shafts. The support mechanisms support sealing elements for forming lateral heat seals on a tubular packaging material from which the bags are formed. The support mechanisms are such that the sealing elements are tiltable with respect to the tubular packaging material, and so that two sealing elements can be maintained in directly opposed engagement to one another across the packaging material as the seal is formed. The machine includes a squeezing mechanism that operates to force the packaged material downward within the tubular material and out of a sealing region before the seal is formed. The machine also includes a shutter mechanism to force the packaged material upward and to prevent the packaged material from entering the sealing region as the seal is formed.

Claims14

Dependent claims

A lateral sealing mechanism for use in a bag making and packaging machine for filling a packaged material while sealing a tubularly shaped packaging material in longitudinal and lateral directions to make a bag, the sealing mechanism being adapted for sealing the packaging material in a lateral direction perpendicular to a transporting direction of the packaging material, the lateral sealing mechanism comprising:

a sealing element operable to contact the tubular packaging material to seal the packaging material in a lateral direction;
a cam having a cam face on a periphery thereof;
a support mechanism having a cam follower engageable with the cam face and supporting the sealing element, the support mechanism being movable so that the sealing element is contacted with and separated from the packaging material;
a rotary shaft for rotating the support mechanism about a center of rotation thereof;
and
a lateral direction drive mechanism for moving the cam and the rotary shaft together in a direction perpendicular to the rotary shaft during the rotation of the support mechanism.

3 more elements

Dependencies are inferred from the claim text.

Lateral sealing mechanism for bag making and packaging machine, and bag making and packaging machine

Life of this patent

Lateral sealing mechanism for bag making and packaging machine, and bag making and packaging machine

Life of this patent

Abstract

Claims14