Apparatus for the opening and separating of valve bags

• US 5,050,651 A
• Filed: 07/26/1990
• Issued: 09/24/1991
• Est. Priority Date: 07/26/1990
• Status: Expired due to Term

• Current Assignee: Bates Ventilsakke Company A/S
• Original Assignee: Bates Ventilsakke Company A/S
• Inventors: Hejlesen, Christian
• Primary Examiner(s): Recla, Henry J.
• Assistant Examiner(s): KUPFERSCHMID, KEITH
• Application Number:
  US07/558,778
• Time in Patent Office: 425 Days
• Field of Search: 141/114, 141/68, 141/166, 141/315, 141/314, 53/571, 53/573, 53/385.1
• US Class Current: 141/314
• CPC Class Codes: B65B 43/262 opening of valve bags

Abstract

An apparatus for opening the upper and lower surfaces of a flat-folded valve bag and for separating a valve bag from a stack of valve bags includes a wedge-shaped insertion member comprising two movable parts mounted on a movable carriage. The movable parts are inserted into the valve and splayed to separate the valve. The carriage moves the insertion member and valve bag upward to separate the bag from a stack of bags. The apparatus also includes a device for depressing the bags and an air blower which directs air along the upper surface of the valve to open the valve for insertion of the insertion member.

Claims

1. Apparatus for opening upper and lower surfaces of a flat-folded valve of a valve bag and separating a valve bag from a stack of valve bags comprising a wedge-shaped insertion member having two separate mutually movable parts, each of said movable parts having a distal inserting end and a proximal end, said insertion member being supported at each of said proximal ends by carriage means which cooperates with said insertion member to move the inserting ends of the insertion member into a flat-folded valve of a valve bag;

means for distending said upper and lower surfaces of said valve by the mutual movement away from each other of the said movable parts;

attached to roller means attached to the inserting end of one of the movable parts of the insertion member to assist the inserting end to roll on the lower surface of said valve; and

means for moving said carriage means to separate the valve bags from a stack of valve bags.

2. Apparatus according to claim 1 wherein at least one means for depressing a lower part of said valve are attached to said carriage means.

3. Apparatus according to claim 2 wherein said depressing means consist of two finger-like bars that extend along a downward-facing side of the insertion member, the insertion member being displaceable in a mainly horizontal direction relatively to the said bars.

4. Apparatus according to claim 1 wherein the insertion member is provided with means for directing an air flow toward and along an upper surface of the said valve.

5. Apparatus according to claim 4 wherein the means for directing air flow consist of at least one nozzle, each nozzle having several air discharge outlets.