SIMPLE TYPE FILTER

PROBLEM TO BE SOLVED: To provide a simple type filter suppressing rapid opening of an opening part and preventing jumping-out of an extract object when opening the opening part accompanied by work pulling out in a front/rear direction a support body fastened on front/rear surfaces of a filter bag body.SOLUTION: In a simple type filter configured to open an opening part 7 by pulling support bodies 3, 3 fastened on surfaces 2a, 2b of a bag body 2, a center part of the opening part 7 is a fragile connection part 17a, and right and left parts sandwiching the fragile connection part 17a are strong connection parts 17b, 17b. When pulling force is applied in opening to the center part fastened with the support bodies 3, 3, the fragile part 17b in the center part first starts opening, and then opening is spread to the strong connection part 17a, thereby an opening state of the opening part 7 is advanced sequentially from a part to the whole, simultaneous opening is prevented, and an extract object is prevented from jumping out in opening. 【課題】フィルタ製の袋本体の前後の面部に止着する支持体を前後方向に引き出す作業に伴わせて開口部を開放するに当って該開口部の急激な開放を抑制し、被抽出物の飛び出しを防止するようにした簡易型濾過器を提供する。【解決手段】袋本体２の面部２ａ，２ｂに止着する支持体３，３の引っ張りによって開口部７を開放するようにした簡易型濾過器にあって、上記開口部７の中央部分を脆弱な接合部１７ａとし、この脆弱な接合部１７ａを挟む左右の部分を強固な接合部１７ｂ，１７ｂにして、前記支持体３，３が止着する中央部分に開封時の引っ張り力が働いたとき、該中央部分の脆弱な接合部１７ｂが先に開封を開始し、その後前記強固な接合部１７ａに開封を波及させて前記開口部７の封止状態を部分から全体に順次進行させ、同時開封を防止して開封時の被抽出物の飛び出しを防止する。【選択図】図１