# US 8,783,325 B2 · Longitudinal continuous welding device for packaging machines

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- Number: US 8,783,325 B2
- Document ID: US8783325B2
- Status: Granted
- Kind: B2
- Application number: 13/467,683
- Filed: 2012-05-09
- Published: 2012-11-15
- Granted: 2014-07-22
- Earliest claimed: 2011-05-12
- Assignees: Eficiencia y Tecnologia, S.A.
- Applicants: José Ma Broto Solano
- Inventors: José Ma Broto Solano
- Web page: https://patentgrep.com/patent/US8783325B2

## CPC

- B29C 65/085: {using a rotary sonotrode}
- B29C 65/08: using ultrasonic vibrations {(non-plastics element to plastics elements B29C65/645)}
- B29C 65/088: {using several cooperating sonotrodes, i.e. interacting with each other, e.g. for realising the same joint}
- B29C 65/7805: {the parts to be joined comprising positioning features}
- B29C 65/7894: {of continuously moving sheets or webs}
- B29C 66/004: {Preventing sticking together, e.g. of some areas of the parts to be joined}
- B29C 66/1122: {Single lap to lap joints, i.e. overlap joints (B29C66/45, B29C66/472, B29C66/52272 take precedence)}
- B29C 66/232: {said joint lines being multiple and parallel, i.e. the joint being formed by several parallel joint lines}
- B29C 66/43: {Joining a relatively small portion of the surface of said articles (B29C66/45 takes precedence)}
- B29C 66/43121: {Closing the ends of tubular or hollow single articles, e.g. closing the ends of bags (closing tube ends B29C57/10)}
- B29C 66/474: {said single elements being substantially non-flat}
- B29C 66/49: {Internally supporting the, e.g. tubular, article during joining (B29C66/63 takes precedence)}
- B29C 66/73921: {characterised by the materials of both parts being thermoplastics}
- B29C 66/81427: {comprising a single ridge, e.g. for making a weakening line; comprising a single tooth}
- B29C 66/81431: {comprising a single cavity, e.g. a groove}
- B29C 66/8161: {said pressing elements being supported or backed-up by springs or by resilient material}
- B29C 66/8242: {Pneumatic or hydraulic drives (using fluid pressure directly acting on the parts to be joined B29C66/8266)}
- B29C 66/83221: {cooperating reciprocating tools, each tool reciprocating along one axis}
- B29C 66/836: {Moving relative to and tangentially to the parts to be joined, e.g. transversely to the displacement of the parts to be joined, e.g. using a X-Y table (B29C66/65 takes precedence)}
- B29C 66/851: {Bag or container making machines}
- B29C 66/876: {Maintenance or cleaning}
- B65B 61/188: {by applying or incorporating profile-strips, e.g. for reclosable bags}
- B29C 66/81417: {being V-shaped}
- B29C 66/8167: {Quick change joining tools or surfaces}
- B29C 66/8322: {Joining or pressing tools reciprocating along one axis}
- B29C 66/849: {Packaging machines}
- B29L 2005/00: Elements of slide fasteners
- B29L 2023/20: Flexible squeeze tubes, e.g. for cosmetics
- B31B 70/644: {Making seals parallel to the direction of movement, i.e. longitudinal sealing}
- B31B 70/8132: {Applying the closure elements in the machine direction}
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- B65B: MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING (bundling and pressing devices for cigars A24C1/44; devices for tensioning and securing binders adapted to be supported by the article or articles to be bound B25B25/00; applying closure members to bottles, jars or similar containers B67B1/00-B67B6/00; concurrent cleaning, filling and closing of bottles B67C7/00; emptying bottles, jars, cans, casks, barrels or similar containers B67C9/00)
- B29L: INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B31B: MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER (making wound articles, e.g. wound tubes, B31C; combined making and filling B65B)

## Abstract

A longitudinal continuous welding device for packaging machines includes structural features aimed at enabling it to act continuously on opposite sides of layers of material to be welded, joining and welding them continuously, as they pass through the inside of the welding device, while the device remains static, without the possibility of movement in the direction in which the layers of material to be welded advance.

## Claims

### Claim 1

Longitudinal continuous welding device for packaging machines comprising:
one supporting piece (1) for layers of material to be welded continuously;
at least one ultrasonic welder (2) equipped with a sonotrode (21), and wherein the sonotrode (21) and the supporting piece (1) face each other horizontally, arranged on opposite sides of a longitudinal path along which the layers of material (M) to be welded continuously advance inside the packaging machine, wherein both the at least one ultrasonic welder (2) and the supporting piece (1) are unable to move in the direction of longitudinal movement of the layers of material (M);
at least one positioning element (3) to arrange the welding device in a non-operating position, in which the sonotrode (21) of the welder and the supporting piece (1) remain distanced horizontally, or in an operating position for welding in which the sonotrode (21) and the supporting piece (1) are maintained very close to each other; and
at least one elastic pusher (4), which acts on at least one of the ultrasonic welder (2) and the supporting piece (1) to push them against the opposite sides of the layers of material (M) to be welded continuously;
wherein said at least one elastic pusher (4) is configured and arranged to enable the separation between the ultrasonic welder (2) and the supporting piece (1) to vary at a very high frequency, due to the action of the sonotrode (21), enabling the layers of material (M) to be welded to continuously advance through the space between the supporting piece (1) and the sonotrode (21) as these conduct the welding of the layers of material (M).

### Claim 2 (depends on 1)

The device according to claim 1, wherein at least one of the sonotrode (21) and the supporting surface area of the supporting piece (1) for the layers of material (M) to be welded have longitudinal reliefs (11) on the front, aimed in the direction in which the layers of material (M) to be welded continuously advance.

### Claim 3 (depends on 1)

The device according to claim 1, wherein there are two ultrasonic welders (2, 2′) with respective sonotrodes (21) facing the opposite sides of a supporting piece (1), and two paths between the supporting piece (1) and the sonotrodes (21) for the circulation of two groups of layers of material (M) to be welded continuously, and simultaneously, by the respective ultrasonic welders (2, 2′).

### Claim 4 (depends on 3)

The device according to claim 3, wherein the supporting piece (1) presents longitudinal channels (12, 13) on the opposite sides, each for guiding at least one of the layers of material (M) to be welded through each of the ultrasonic welders (2, 2′).