초록 ▼

An elongated web of bag-making material (S) is bent into a tubular form by a former (2), transported along a path (A), is filled with articles (W) and sealed by a transverse sealer (10) transversely to its direction of motion. A pair of seal jaws (20) supported by rotary arms (12) are rotated in mut

An elongated web of bag-making material (S) is bent into a tubular form by a former (2), transported along a path (A), is filled with articles (W) and sealed by a transverse sealer (10) transversely to its direction of motion. A pair of seal jaws (20) supported by rotary arms (12) are rotated in mutually opposite directions by a power-communicating mechanism (P) which includes a trajectory-forming mechanism (H) such that the seal jaws (20) will each travel on a generally D-shaped trajectory with a linear section along the path (A) of the bag-making material (S). Cramming devices (50) are adjustably attached to the rotary arms (12) and stroke the tubularly shaped bag-making material (S) from both sides in forward-backward direction (X) without substantially closing the bag being formed such that the articles (W) can be more efficiently crammed with empty spaces among them effectively reduced. Stripping rods (42) are attached to the seal jaws (20) for stripping down the articles being dropped into the bag immediately before the transverse sealing and after the cramming by the cramming devices (50) so as to prevent them from becoming caught between the seal jaws (20).

대표청구항 ▼

[ What is claimed is:] [1.] A transverse sealer for a bag maker-packaging machine, said bag maker-packaging machine having a former for bending an elongated web of bag-making material into a tubular form, dropping articles to be packaged into said tubularly formed bag-making material while transport

[ What is claimed is:] [1.] A transverse sealer for a bag maker-packaging machine, said bag maker-packaging machine having a former for bending an elongated web of bag-making material into a tubular form, dropping articles to be packaged into said tubularly formed bag-making material while transporting said bag-making material along a specified path, and to thereafter seal said bag-making material transversely to said path, said transverse sealer comprising:a pair of transverse sealing means, disposed on downstream side of said former relative to said path and on opposite sides of said path, for thermally sealing said bag-making material in a transverse direction relative to said path;a power transmitting means for transmitting power to cause said pair of transverse sealing means to undergo revolving rotary motions in mutually opposite directions, said power transmitting means including a trajectory forming means for causing each of said transverse sealing means to move completely around and over a specified closed-loop trajectory; andcramming devices connected to said power transmitting means to undergo a different revolving rotary motion completely around and over another closed-loop trajectory of a different shape from said specified closed-loop trajectory in coordination with said rotary motion of said transverse sealing means for stroking and pressing said bag-making material from both sides thereof without substantially closing said tubularly formed bag-making material to thereby reduce empty spaces among said articles inside said tubularly formed bag-making material.