US 4,244,773 AGranted

Apparatus for applying weldable bands to packages or the like

OwnerGunter Siebeck, Peter P. Ludtkeinventors

Life of this patent

Estimating the term…

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Abstract

Apparatus for applying a weldable web or band of synthetic plastic material to a package on a table has a feeding device which advances the web from a source into the channel of a mobile loop forming device loosely surrounding the package. The feeding device is arrested when the web is looped around the package so that the end portions of the resulting loop overlap. The loop forming device is then removed and the web is moved rearwardly so that the loop snugly surrounds the package. In the next step, the web is severed between the outer overlapping portion of the loop and the source, and the severing device is withdrawn so that the sonotrode of an ultrasonic welding unit can bond the outer portion of the loop to the adjacent inner portion all the way to the cut where the outer portion was severed from the source.

Claims17

Dependent claims

In an apparatus for applying webs around packages or other objects, the combination of a support;

means for positioning an object on said support;
a source of web;
a device for looping the web around the object in said positioning means so that the looped section of the web includes overlapping inner and outer portions;
means for bonding said overlapping portions to each other, including a bonding element movable toward and away from said outer portion along a first path;
means for severing said outer portion from the source;
and mobile holder means for moving said severing means along a second path to a first position in which said severing means is located in said first path and severs the outer portion along a cut located in a predetermined plane disposed within said first path and a second position in which said severing means is retracted from said first path so that said bonding element can move toward said outer portion while said cut remains in said first path to connect said outer portion with said inner portion all the way to said cut.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 06/016,529Filed 1 Mar 1979
Priority: LU 791603 Mar 1978
Granted: 13 Jan 1981
Term ends: Not estimatedThe source records don’t support an estimate.

Classification16 codes

B65B 13/325
By welding, soldering, or heat-sealing; by applying adhesive: ultrasonic welding
B29C 65/08
By heating, with or without pressure: using ultrasonic vibrations
B29C 65/7451
Using a single unit having both a severing tool and a welding tool: the severing tool and the welding tool being movable with respect to one-another
B29C 65/7841
Means for handling the parts to be joined, e.g. for making containers or hollow articles , e.g. means for handling sheets, plates, web-like…:…