Manufacturing container or tube from paper; or other manufacturi – With cutting – breaking – tearing – or abrading – And with bending
Patent
1980-01-25
1982-07-27
Coan, James F.
Manufacturing container or tube from paper; or other manufacturi
With cutting, breaking, tearing, or abrading
And with bending
83455, 493372, 493340, B26D 102
Patent
active
043415245
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a working head in an apparatus for providing rectangular cuttings in and/or impressions on a plain material. Especially the invention relates to a cutting head for a passepartout-machine having a holder for a knife and/or an impression roller which can be raised, rotated and lowered.
When cutting a passepartout, i.e. a border of cardboard or similar material for an artistic work or a photo the picture is normally measured by means of a measuring rod, corner points are marked on a cardboard disc and thereafter the various sides are cut out by hand. Thereby the cut out sides have to be bevelled. This method is time consuming and necessitates some skill of the operator since there is a great risk of false cutting, especially at the corners.
Different apparatus for facilitating the provision of rectangular cuttings have been proposed such as adjustable angle frames and moveable angle rules which may even carry a knife which can be moved along one side at a time. The U.S. Pat. No. 3,967,519 describes an apparatus for cutting passepartouts and similar means comprising a knife holder and a rotatable knife blade which can be moved along a groove on a substrate. With the knife in lowered position one side is first cut out and thereafter the knife must be raised and rotated and thereafter lowered for each corner, which is made manually by different movements by the hand. The working head according to the invention is characterized in that the holder for the knife and/or the impression roller is connected to a rotatable housing for being raised and lowered respectively, and a pressure roller which is intended to contact the material during the working is connected to the rotatable housing to be raised and lowered. The rotatable housing is fixedly connected to a central shaft at the upper part of which a Maltese cross is connected and the said central shaft can be rotated intermittently by engagement by a pin cam disc on a driving shaft of the Maltese cross so that the central shaft is rotated one forth of a turn when the driving shaft is rotated one turn.
By using a working head according to the present invention it is possible to automatically obtain a cutting of a corner as follows: When the cutting of one side is finished the holder for the knife is raised into resting position when the driving shaft is rotated, it is rotated 90.degree. and is thereafter lowered to working position without any hand movements. Thereby a substantial saving of time and simplification is obtained in cutting a passepartout as compared with the previously known techniques, and also an exact precision cutting is obtained.
A cutting head according to the invention may preferably be used together with a passepartout-machine of the type which is described in the German Pat. No. 26 52 531.5 and which is further illustrated in the following. Thereby it is possible to quite automatically cut a complete passepartout whereby the cutting head is raised, rotated and lowered at each corner and is moved between the corners during the cutting.
The working head according to the invention also can be used for providing an impression or a pattern on a passepartout or any other plain object. For making those cuttings and impressions at the same time of a passepartout both a knife and an impression roller may be connected to the holder, whereby the impression roller can be brought to roll on until the corner impression is full filled when the knife has reached the corner and stopped.
For a passepartout normally cardboard is used, but also paper, plastic, metal foil or similar material of course can be used if wanted. The intended material, however, should be substantially plain.
The invention will now be described more closely with reference to the accompanying drawings of which:
FIG. 1 is a vertical cross section through a working head according to the invention;
FIGS. 2-5 show different details of the cutting head according to FIG. 1; and,
FIG. 6 is a diagrammatic perspective view of a passepartout-machine having a cutti
REFERENCES:
patent: 3477322 (1969-11-01), Gerber et al.
patent: 3511123 (1970-05-01), Smith
patent: 3511124 (1970-05-01), Bruns
patent: 3967519 (1976-07-01), Esterly
patent: 4047457 (1977-09-01), Stubbings
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