Severing by tearing or breaking – Methods – With preliminary weakening
Patent
1989-01-10
1991-01-29
Phan, Hien H.
Severing by tearing or breaking
Methods
With preliminary weakening
225 93, 225 965, C03B 3303
Patent
active
049880276
DESCRIPTION:
BRIEF SUMMARY
The present invention is concerned with apparatus for cutting glass, and more particularly laminated glass. Laminated glass is generally characterized by two sheets of glass between which is sandwiched a thin layer of plastics material that serves amongst other things as a bonding medium.
The cutting of laminated glass entails the separate cutting of the two glass sheets. There are many ways of doing this, ranging from the use of relatively sophisticated (and hence expensive) machinery to relatively crude techniques which unfortunately suffer from being labour intensive. For instance, one item of machinery effects cutting of the two sheets on a table at the one time, one cutter arranged above the table and the other below. This machinery is very expensive and not without its problems; the lower cutting, for example, is only performed with considerable difficulty. At the crude end of the market so to speak, the laminated sheet is manually turned over or around and this, due to the overall weight of the sheet, can sometimes involve as many as four workmen to achieve that end.
It is the object of the present invention to provide apparatus for cutting laminated glass, which is simple and effective, of moderate cost and at the same time not labour intensive.
To this end, the invention according to one aspect makes provision for apparatus for cutting laminated glass comprising-- part, between a first position where it lies generally side by side with, or optionally in the same plane as the second part and a second position where it assumes an upright disposition with respect to the second part; first and second positions; glass; and first part of the table with the partially cut glass thereon is moved to said second position to facilitate delivery of the glass to the second part of the table from whence the lowermost sheet may be cut in the same or a similar manner to the uppermost sheet.
Another aspect of the invention provides for a method of cutting laminated glass comprising: lowermost sheet of the glass is presented for cutting in the same or a similar manner to the uppermost sheet; and the table to an upright position with respect to a second part, thereby facilitating delivery of the glass to the second part in an inverted state .
In order that the invention may be more fully described and/or understood, reference is now made to a preferred embodiment as illustrated in the accompanying Figures.
FIG. 1--Plan view of the apparatus according to an embodiment of the invention.
FIG. 2--Front view of the apparatus according to an embodiment of the invention.
Referring now to both FIGS. 1 and 2, the apparatus--generally designated as 1--comprises a table 2 made up of two halves 3, 4. The half 3 is movable with respect to the half 4 under the influence of a hydraulically operated ram 5; see the arrow 6 for the general extent of movement of the half 3. The half 4 is fixed.
A rack 7 is arranged at one end adjacent the half 3 according to one system; or, in accord with another, along one side 8 of the table 2. The rack accommodates a number of precut to size pieces of laminated glass stacked in the manner best illustrated at position `S` (the side position). Referring next, however, to the end position E, delivery of the first piece of glass to the table half 3 is achieved simply by tipping that piece beyond the vertical and allowing it to free fall on to the half 3. To this extent, then, the delivery means in this particular embodiment is a manual means; but, it need not necessarily be so. Air flotation means 10 may or may not be turned on while the glass free falls onto the half 3.
Once the glass piece has been thus delivered, the first cut in the uppermost sheet is made as required. Air flotation means 10, by the use of a manifold (not shown) to switch the air flow on the table, can create a vacuum thereon to hold the glass and aid in the cutting process. The glass is then moved to a position where the cut lies directly over a breaker bar 9, movement being facilitated with the aid of air flotation means 10 which
REFERENCES:
patent: 2111393 (1938-03-01), Gaskell
patent: 3465934 (1969-09-01), Ono et al.
patent: 3543978 (1970-12-01), Feillet
patent: 3668955 (1972-06-01), Rupprecht et al.
patent: 4471895 (1984-09-01), Lisec, Jr.
patent: 4747329 (1988-05-01), Lukens
Bremner Glass Equipment Pty. Ltd.
Phan Hien H.
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