I1T4S3 Presentation about softdrinks

By Brian Lemay No comments

Hi, Dawn. Oh hi, Ilmar. I’m glad I’ve bumped into you. I’ve just found a great idea for the presentation
we’ve got to do for Dr Banks next month. What, the one on everyday objects? Yes … look at this article … it’s really
interesting. The aluminium coke can? You know … coca cola cans, soft drink cans. Look let’s sit down here. Have you got a minute? Sure … I’ll just get my bag. OK, so you think we can get a presentation
out of this article? I’m sure we can. First of all we can provide some interesting
facts about the aluminium cans that we drink out of every day. Like … ? Well, here … it says that in the US they
produce 300 million aluminium drink cans each day. Wow! 300 million! Exactly. That’s an enormous number. It says here “outstrips the production of
nails or paper clips”. And they say that the manufacturers of these
cans exercise as much attention and precision in producing them as aircraft manufacturers
do when they make the wing of an aircraft! Really! Let’s have a look. They’re trying to produce the perfect can
– as thin but as strong as possible. Mmm … this bit’s interesting … “today”s
can weighs about 0.48 ounces: thinner than two pieces of paper … from
this magazine say.’ Yeah, and yet it can take a lot of weight. More than 90 pounds of pressure per square
inch — three times the pressure of a car tyre. OK, I agree, it’s a good topic. What I thought was that we could do a large
picture of a coke can and label it and then talk about the different parts. Look, I’ve done a rough picture here. OK, so where shall we start? Well, the lid is complicated. Let’s start with the body first. I’ll do a line from the centre of the can
… like this … and label it “body “. What does it say? It”s made of aluminium, of course, and it’s
thicker at the bottom. Right, so that it can take all that pressure. And then I think you should draw another line
from the body for the label. Right “label”. The aluminium is ironed out until it’s so
thin that it produces what does it say? “A reflective surface suitable for decoration.” That’s right apparently it helps advertisers,
too. Yes, because it’s so attractively decorated. Good … and then there’s the base. Yes, it says the bottom of the can is shaped
like a dome so that it can resist the internal pressure. That’s interesting. I didn’t know that. Nor did I. OK, so going up to the lid … there
are several things we can label here. There’s the rim around the edge which seals
the can. Got that. And there’s a funny word for the seal isn’t
there? Yes, it’s a flange What does it say about it? Well, the can’s filled with coke or whatever
and after that the top of the can is trimmed and then bent over to secure the lid. That’s right, it looks like a seam. We could even do a blow-up of it like this
F-L-A-N-G-E … Yes, that would be clearer. I think we should label the lid itself and
say that it constitutes twenty five percent of the total weight. Twenty-five percent … so it’s stronger
than the body of the can. So to save money, manufacturers make it smaller
than the rest of the can! Didn’t know that either … so how do we
open a can of coke? Mmm … first of all there’s the tab which
we pull up to open the can and that’s held in place by a rivet. Mmm … I think that’s too small for us
to include. I agree, but we can talk about it in the presentation. We can show the opening though. That’s the bit of the can that drops down
into the drink when we pull the tab. Yeah, hopefully. Sometimes the tab just breaks off. I know. Anyway the opening is scored so that it pushes
in easily but doesn’t detach itself. OK, we can show that by drawing a shadow of
it inside the can, like this I’ll label it scored opening. Great … well, I think we’ve got the basis
of a really interesting presentation. Let’s go and photocopy the article. Fine. I’ll take it home and study it some more.

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