Stock material or miscellaneous articles – Layer or component removable to expose adhesive – Metal containing
Patent
1997-03-18
1999-02-02
Ahmad, Nasser
Stock material or miscellaneous articles
Layer or component removable to expose adhesive
Metal containing
83169, 83613, 225 43, 225 49, 225 91, 428 342, 428 418, 428192, 428194, B65H 3500
Patent
active
058662219
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a serrated cutting strip for a carton, the use of a material in the formation of the strip and a method and apparatus for applying a cutting strip to a carton.
BACKGROUND OF THE INVENTION
It is known to apply a metal cutting strip to a carton for cling film so that cling film withdrawn from the carton can be cut on the metal cutting strip. The metal strip may be applied by a machine such as a Faustel D17 Edger. In the machine, metal sheet from a roll is advanced by passing between driven rollers. The sheet enters a guide comprising a shallow slot. The guide is angled downwardly at its end and directs the sheet between a block and a lower die. An upper die is movable to cut the sheet. The upper die also includes pins which pass through the block and lower die to perforate the sheet before it is cut. This perforating action leaves downwardly extending teeth around each perforation. When the upper die has cut a strip from the sheet, the strap is held onto the die by suction and is carried down onto a carton blank where the pressure of the upper die forces the teeth into the carton to mechanically fix the metal strip to the carton.
The known method is relatively slow and the metal strip blunts the dies relatively quickly so that they must be re-sharpened.
SUMMARY OF THE INVENTION
According to one aspect of the invention there is provided a method of applying a cutting strip to a carton comprising advancing a substrate comprising a sheet of cutting strip material having adhesive on one side thereof and a release sheet over the adhesive, peeling away the release sheet in front of a cutter, cutting the cutting strip material into a strip with the cutter, and, bringing the adhesive carrying side of the strip into contact with the carton.
In this way, the substrate material need not be metal, but can be any suitable desired material which may, for example, be easier to cut than metal. Also, the perforation step of the known method is not required. The omission of this step and the ability to use material which is easily cut means that productivity can be greatly increased by means of the method of the invention.
Preferably, the release sheet is peeled away just in front of the cutter. This avoids the possibility of the adhesive carrying side of the cutting strip material collecting dust or debris, or becoming affixed to the machine before it is cut and applied to the carton.
The substrate may be advanced in any suitable way and in a preferred embodiment, the substrate is advanced by pulling the part of the release sheet which has been peeled away from the cutting strip material.
Preferably, a light evaporation oil is applied to the cutting strip material prior to the cutting step. This lubricates the cutting operation.
According to another aspect of the invention there is provided apparatus for carrying out the method of the first aspect of the invention.
According to a further aspect of the invention there is provided a Faustel D17 Edger machine having an extension on the lower wall of the feed material guide slot, the extension extending the lower wall and providing an edge for peeling at a position adjacent the path of the cutting die.
The normal Faustel D17 Edger machine has a guide slot which terminates too far from the path of the cutting die to avoid sticking problems if the edge of the lower wall of the guide slot is used to peel back the release sheet. The use of an extension enables a cutting strep material with a release sheet to be used effectively.
Preferably, means is provided for applying a high evaporation oil to the feed material before it enters the machine.
According to another aspect of the invention there is provided apparatus for cutting and applying a cutting strip to a carton from a substrate comprising a sheet of cutting strip material having adhesive on one side thereof and a release sheet over the adhesive, the apparatus comprising means for advancing a substrate sheet, a cutter, an edge in front of the cutter and means for drawing a release sheet away from
REFERENCES:
patent: 5135784 (1992-08-01), Okumura
Jamie Ian
Owen Edwin Wyn
Ahmad Nasser
Browning Clifford W.
Carton Edge Limited
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