US 12,122,119 B2
Heat seal device and bag making apparatus
Hideo Ohnishi, Kyoto (JP)
Assigned to Totani Corporation, Kyoto (JP)
Appl. No. 18/033,797
Filed by Totani Corporation, Kyoto (JP)
PCT Filed Sep. 15, 2021, PCT No. PCT/JP2021/033943
§ 371(c)(1), (2) Date Apr. 25, 2023,
PCT Pub. No. WO2022/113486, PCT Pub. Date Jun. 2, 2022.
Claims priority of application No. JP2020-197911 (JP), filed on Nov. 30, 2020.
Prior Publication US 2023/0330962 A1, Oct. 19, 2023
Int. Cl. B31B 70/64 (2017.01)
CPC B31B 70/644 (2017.08) [B31B 70/642 (2017.08)] 7 Claims
OG exemplary drawing
 
1. A heat seal device for heat-sealing bag components, comprising:
a pair of supports disposed to be spaced from one another in a first horizontal direction;
a beam supported by the pair of supports and extending in the first horizontal direction between the pair of supports;
a slider configured to be movable in a vertical direction with respect to the beam;
a first heat seal member configured to be moved together with the slider in the vertical direction;
a second heat seal member facing the first heat seal member in the vertical direction;
a vertical movement mechanism for moving the pair of supports and the beam in the vertical direction to move the slider and the first heat seal member towards and away from the second heat seal member;
at least two primary biasing members located between the slider and the beam to bias the slider and the first heat seal member towards the second heat seal member when the bag components are sandwiched between the first and second heat seal members; and
a secondary biasing member located between the slider and the beam to bias the slider and the first heat seal member towards the second heat seal member when the bag components are sandwiched between the first and second heat seal members,
wherein the at least two primary biasing members are arranged in a straight line in the first horizontal direction,
wherein the secondary biasing member is arranged offset from the at least two primary biasing members in a second horizontal direction perpendicular to the first horizontal direction; and
wherein the heat seal device is configured to allow adjustment of biasing force applied to the first heat seal member by the secondary biasing member.