Transverse sealer for packaging machine
AssigneeIshida Scales Mfg. Co., Ltd.
InventorMasao Fukuda
Life of this patent
Estimating the term…
Abstract
A transverse sealer for a packaging machine has a pair of seal jaws for sealing a film after it is made into the shape of a bag by a former and the bag is filled with articles to be packaged. The pair of seal jaws are disposed on opposite sides of the path of the film and downstream to the former. A pair of rotary arms supporting these seal jaws is moved towards and away from each other such that the seal jaws move in straight trajectories along the path of the film and is so controlled that the compressive force between the seal jaws can be maintained at a specified level according to the thickness and material property of the film.
Claims20
A transverse sealer for a packaging machine for sealing a bag in a transverse direction after said bag is filled with articles to be packaged, said bag being made from a belt-like elongated film moving on a transportation path in an film-transporting direction, said transverse direction being transverse to said film-transporting direction, said transverse sealer comprising:
- a pair of transverse sealing means disposed downstream to bag-forming means for transforming said film into a specified shape for forming a bag and opposite to each other on mutually opposite sides of said transportation path of said film;
- a pair of rotary driving means for causing said pair of transverse sealing means to rotate in synchronism with each other such that said transverse sealing means move along said film-transporting direction when said transverse sealing means are near each other;
- and
- a trajectory-compression adjusting means for causing said pair of transverse sealing means to move on straight trajectories along said transportation path of said film by causing said pair of rotary driving means to move towards and away from each other and maintaining a compressive force between said pair of transverse sealing means at a specified level while said pair of rotary driving means causes said pair of transverse sealing means to sandwich and compress said film therebetween.
A transverse sealer for a packaging machine for sealing a bag in a transverse direction after said bag is filled with articles to be packaged, said bag being made from a belt-like elongated film moving on a transportation path in an film-transporting direction, said transverse direction being transverse to said film-transporting direction, said transverse sealer comprising:
- a pair of transverse sealing means disposed downstream to bag-forming means for transforming said film into a specified shape for forming a bag and opposite to each other on mutually opposite side of said transportation path of said film;
- and
- a compression adjusting means both for moving said pair of transverse sealing means in an approach-separation direction towards and away from each other to thereby sandwich said film at a specified seal position thereon for thermal sealing and for maintaining a compressive force between said pair of transverse sealing means at a specified level;
- said compression adjusting means comprising:
- a pair of mobile frames which are movable in an approach-separation direction in which said pair of transverse sealing means moves towards and away from each other, each supporting one of said transverse sealing means and receiving the reaction force to said compressive force;
- a linear-to-rotary motion conversion means for converting the relative motion between said pair of mobile frames due to said reaction force into a rotary motion;
- and
- a frame-moving motor for moving said pair of mobile frames towards and away from each other in said approach-separation direction through said linear-to-rotary motion conversion means.
A transverse sealer for a packaging machine for sealing a bag in a transverse direction after said bag is filled with articles to be packaged, said bag being made from a belt-like elongated film moving on a transportation path in an film-transporting direction, said transverse direction being transverse to said film-transporting direction, said transverse sealer comprising:
- a pair of transverse sealing means disposed downstream to bag-forming means for transforming said film into a specified shape for forming a bag and opposite to each other on mutually opposite sides of said transportation path of said film;
- a pair of rotary driving means for causing said pair of transverse sealing means to rotate in synchronism with each other such that said transverse sealing means move along said film-transporting direction when said transverse sealing means are near each other;
- and
- a trajectory-compression adjusting means for causing said pair of transverse sealing means to move on straight trajectories along said transportation path of said film by causing said pair of rotary driving means to move towards and away from each other and maintaining a compressive force between said pair of transverse sealing means at a specified level while said transverse sealing means and said film move continuously along said transportation path and said pair of rotary driving means causes said pair of transverse sealing means to sandwich and compress said film therebetween.
Dependencies are inferred from the claim text.