"6. The goods in question consist of a polystyrene
container in which are packed in designated spaces the
following:
(i) a toner cartridge being a moulded plastic receptacle
containing 'toner',
(ii) a toner collecting container which
also has incorporated as part of the
moulding of that vessel, a fuse, and
(iii) a roller cleaner
together with a set of instructions. The container is
surrounded by a cardboard envelope bearing, amongst other
words and symbols, the words 'Toner Kit'.
7. The toner is eventually transferred by the operation
of the laser printer onto paper and is, to use a broad
analogy, the 'ink' which is printed onto the paper. The
Applicant's witness, Mr Nuij, was unable to state the
chemical composition of the toner, except to say it
contained part carbon, part resin and other chemicals.
...
9. The laser printer itself utilises electro static
forces to deposit toner in the form of characters onto paper
and the paper and toner are then fused together and the
printed page is produced from the machine.
...
12. The toner cartridge which is made from moulded plastic
fulfils two functions. One is as a container for the toner
until it is emptied into the developer cartridge which is a
reservoir for the toner. The other use is to act as a seal
between the developer cartridge and the rest of the machine.
If this seal were not in place, then some of the toner
(which is flammable) would escape from the developer
cartridge and enter the working parts of the machine with
consequent disruption to the machine's functioning.
13. The toner collecting container is a moulded plastic
bottle which incorporates a fuse. It collects excess toner
removed by the roller cleaner from the OPC drum in the laser
printer. The work of the machine and the quality of its
printing would be affected were excess toner simply to be
allowed to accumulate in the machine.
...
15. The roller cleaner when installed scrapes excess toner
from the upper heat roller contained in the printer and thus
ensures that there is no dirt or smudge marks on the printed
copy made by the machine. The life of the roller cleaner is
not related to the other goods in the toner kit but it is
included in order that it might be replaced at the same time
as the other items. The machine will operate without the
roller cleaner but, over time, the effectiveness of the
machine to perform its primary task will be impaired."