TOP SEAL DEVICE AND PILLOW PACKING MACHINE

PROBLEM TO BE SOLVED: To provide a top seal device for manufacturing a package of a simple constitution with a folded lug part.CONSTITUTION: A top seal device comprises a pair of top sealers 21, 22 which revolvingly moves in a facing state of sealing faces 21a, 22a and seals a cylindrical film 9 by sandwiching it, and front side and rear side fold-forming sealers 45, 46 disposed at a front face and a rear face of the top sealers, respectively. Each of the fold-forming sealers comprises convex sealer parts 51, 62 having projection strips 51a, 62a, and concave sealer parts 52, 61 having concave grooves 52a, 61a. When the top sealers sandwich the cylindrical film, the projection strips and the concave grooves sandwich the cylindrical film, and form a convex fold-forming line part at an upper or a lower part. By setting temperature of the top sealer having the convex sealer parts higher than temperature of the top sealer having the concave sealer parts, the cylindrical film is folded from the fold-forming line part, and a lug part can be folded following the top sealing treatment.SELECTED DRAWING: Figure 8 【課題】 簡単な構成で耳部を折り曲げた包装体を製造するトップシール装置を提供する【構成】 シール面２１ａ，２２ａが対向した状態で公転移動し、筒状フィルム９を挟み込んでシールする一対のトップシーラ２１，２２と、トップシーラの前面と後面にそれぞれ配置した前方，後方折り癖シーラ４５，４６を備える。各折り癖シーラは、凸条５１ａ，６２ａを有する凸型シーラ部５１，６２と、凹溝５２ａ，６１ａを有する凹型シーラ部５２，６１を備える。トップシーラが筒状フィルムを挟み込むと、凸条と凹溝も筒状フィルムを挟み込み、上または下に凸の折り癖線部を形成する。凸型シーラ部を配置するトップシーラの温度を、凹型シーラ部を配置するトップシーラの温度よりも高温にすることで、折り癖線部を起点として折れ曲がり、トップシール処理に伴い耳部の折曲げができる。【選択図】 図８