Packaging method and means

• US 5,312,318 A
• Filed: 07/30/1992
• Issued: 05/17/1994
• Est. Priority Date: 03/21/1990
• Status: Expired due to Term

• Current Assignee: Lipton Division of Conopco Incorporated
• Original Assignee: Lipton Division of Conopco Incorporated
• Inventors: Buckley, William M., Goodwin, James, Cahill, Michael J., Vernon, Geoffrey W.
• Primary Examiner(s): Kisliuk, Bruce M.
• Assistant Examiner(s): Morgan, Eileen P.
• Application Number:
  US07/922,598
• Time in Patent Office: 656 Days
• Field of Search: 493/194, 493/195, 493/196, 493/197, 493/198, 493/199, 493/200, 493/201, 493/203, 493/223, 493/229, 493/238, 493/239
• US Class Current: 493/194
• CPC Class Codes: B65B 29/028 packaging infusion material into filter bags
• CPC Class Codes: B65D 85/808 for immersion in the liquid to release part or all of their contents, e.g. tea bags

Abstract

Twin compartment packets, e.g. tea bags, are formed with the compartments connected at the heads of the packet and optionally at the tails. The packets are produced from a pair of compartmented tubular webs that are brought together with the compartments in register, the webs then being interconnected at the compartment end seals and severed at those seals to form the separate packets. Apparatus for performing the process deposits doses of tea at spaced intervals onto the two separate webs before forming them into the tubular compartmented webs, brings the compartments of the two webs into register, interconnects the registered compartments, and separates the interconnected compartments into individual packets while the web advances continously through the apparatus. The process is capable of high production rates because the webs are able to move through the successive stages at a uniform speed.

Claims

1. A method of producing twin compartment packets, comprising the steps of dividing each of a pair of tubular webs along its length into a series of discrete compartments, locating said tubular webs in overlapping relationship with their compartments in register, joining the webs at the divisions between the compartments and, after said joining of the webs, severing the interconnected pairs of compartments from the webs as separate twin-compartment packets.

2. A method according to claim 1 wherein each tubular web is divided into said discrete compartments before the webs are brought into overlapping relationship.

3. A method according to claim 1 wherein the compartments of each said interconnected pair of compartments are joined at opposite ends.

4. A method according to claim 3 wherein the compartments of each said interconnected pair are joined at both opposite ends before separation of the pair of compartments from the webs.

5. A method according to claim 3 wherein the compartments of said interconnected pair are joined at one end only before separation of the pair of compartments from the webs, said pair of compartments opposite ends being joined at the end opposite said one end after the compartments are folded over about their join at said one end.

6. A method according to claim 1 wherein the compartments of each web are first separated from each other across part of their width and the registered pairs of compartments are connected together at the regions of partial separation before being severed from their respective webs.

7. A method according to claim 6 wherein said partial separation is effected before the two webs are joined together.

8. A method according to claim 6 wherein the compartments of each web are sealed from each other before said partial separation.

9. A method according to claim 1 wherein said joining of the webs at the divisions between the compartments forms an interconnection at one end of each interconnected pair of compartments that is folded into the length of said pair of compartments to give a generally W-form edge profile.

10. A method according to claim 9 wherein the compartments of each web are first separated from each other across part of their width and the W-form profile is imparted to portions of the compartments connected together at said regions of partial separation before the compartments are severed from their respective webs.

11. Apparatus for forming twin-compartment packets from a pair of compartmented webs, comprising means for feeding the webs in overlapping relationship with pairs of compartments of the respective webs in register, and means for connecting the pairs of compartments together at least at one end of each pair of mutually registered compartments and means for separating the connected pairs of compartments from the webs to produce the individual packets.

12. Apparatus according to claim 11 comprising means for partially separating the compartments of each web from each other before the webs are connected together, and means for connecting together registered pairs of compartments of the respective webs at their regions of partial separation, before said separation of said pairs of compartments from the webs to form the individual packets.

13. Apparatus according to claim 12 wherein said partial separation means produce severed opposite side margins of each of the webs.

14. Apparatus according to claim 12 comprising means for deflecting said regions of said partial separation of the registered compartments transversely to a path of said feed of the respective webs for bringing said regions into engagement to be sealed together for said connection at said regions of partial separation.

15. Apparatus according to claim 11 wherein means are provided for folding said sealed regions to put them between main regions of the registered compartments.

16. Apparatus according to claim 11 wherein respective means are provided for connecting the mutually registered pairs of compartments together at both ends.

17. Apparatus according to claim 11 wherein said means for connecting together the mutually registered pairs of compartments and for separating said pairs of compartments from the webs are arranged to operate on the compartmented webs while the webs are being continuously fed through the apparatus to said separating means.