This is a machine used to make saggar-fired ceramics. Saggars are molds, and this machine is used to pack the molds. The technique is not commonly used anymore in industry (see below for an article about attempts to keep the technology alive by incorporating it into modern industrial processes). I did find a reference to an industrial machine manufactured in PA, and they called it a "saggar filling machine" (see below).

http://k-kikai.com/02_1tairu/03tairu.html
「サヤ詰めライン
タイル生地を窯にて焼成するためにサヤという素焼きの器に詰め、一定枚数積み重ねて焼成窯で焼ける形にします。
空サヤ供給装置
生製品を焼成するためのサヤ（器）をサヤ詰め装置へ供給する移載装置です。
サヤ詰め機
サヤに生製品を詰めて積み重ねる装置です。」

http://www.geocities.jp/tatsukawa_jp/kamatume.html

http://ja.wikipedia.org/wiki/匣鉢
「匣鉢（こうばち）は、陶磁器を焼くときに、素地を火炎その他から保護し、影響を受けないようにするための用いられる耐火性の容器である。さや、えんごろ、ぼし、などともいう。英語では、saggerという。」

http://www.kanesada-seito.com/making3.html
「エンゴロと呼ばれる製品より一回り大きな耐熱のサヤに製品を入れて本焼成を行う。これにより、直接炎があたることなく、熱をマイルドに製品に伝えることができる。一台車あたりの焼成可能製品数を増やすことができ効率が良い。主に、丸い形状が中心。」

http://www.yamakiseito.co.jp/words/page_20.php
「エンゴロとは耐火性の強い土で焼かれた容器のこと。本焼成する際、釉掛けした商品をひとつひとつエンゴロに詰めていく。これはエンゴロを積み重ねていくことによって製品を効率的に大量に窯に詰めていくと同時に過酷な窯の炉内で製品を保護するためである。
ちなみにエンゴロとは瀬戸・美濃地方の方言で地域によってその呼び名も変わる。単に「ゴロ」とも呼ばれる。あるいは匣鉢(サヤ)とも呼ばれる。」

These machines are used with tunnel kilns:
http://www.bunshodo-corp.jp/products/ceramic_industory/ceram...

Confirmed link between saggars and tunnel kilns in English:
http://www.springerlink.com/content/r885l4t1r1325855/

http://en.wikipedia.org/wiki/Saggar_fired_pottery
"Saggar firing is a technique for the firing of pottery.
Saggars are ceramic, boxlike containers which can be used to enclose or protect ware in kilns. Traditionally saggars were made primarily from fireclay[1][2]. Saggars have been used to protect, or safeguard, ware from open flame, smoke, gases and kiln debris[3]: the name is a contraction of "safeguard"[4]. Their use is widespread, including in China, Korea[5], Japan and the United Kingdom.
A Saggar Maker's Bottom Knocker was a job associated with the manufacturer of saggars in the UK[6], a name considered sufficiently amusing for it to be featured on the television panel show What's My Line?[7]. The occupation is not needed with modern automated production techniques[8].
Saggars are still used in the production of ceramics to shield ware from the direct contact of flames and from damage by kiln debris[9][10][11]. Modern saggars are made of alumina ceramic, cordierite ceramic, mullite ceramic and silicon carbide[12][13]."

http://www.kilnman.com/PlantEquip/Motion/saggarfill.html
"Saggar filling and emptying machines
Among the machines we have designed,
we have developed a machine to fill saggars with powder and place those saggars onto a kiln car.
The same machine unloads the saggars from the car, empties them and returns them to the loading platform.
Since each operation is different a call to us will help to show ow we can fit you particular situation."

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Note added at 2 hrs (2011-02-05 16:06:43 GMT)
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My confidence level should have been a 3 rather than a 4. I'm quite sure that this has something to do with pottery firing and/or tile making, but I'm not confident about the name. The context might help you figure out what's going on.

To clarify, the saggars themselves are not molds, but rather protective boxes. The ceramics to be fired are placed inside these boxes, sometimes after the boxes are filled with protective materials like sawdust. This PA machine seems to do the job of filling the saggars with the powders and sawdust, and the un-fired ceramics are presumably placed in the saggars thereafter.

There's also a possibility that this word refers more specifically to tile pressing. The following reference shows that the さや詰め装置 is one part of a tile press (the press part itself, perhaps):
http://www.sekitech-gifu.co.jp/company/index04.html

Weird English, but it has an explanation of the machinery:
http://www.pinaris.com.tr/calsise.htm

Some of the references I included above also referred to tile making, so I'd check the context to see if some of these other machine parts are also mentioned in the source text.

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Note added at 2 hrs (2011-02-05 16:09:46 GMT)
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I think the original translation might also have a fighting chance here:
http://www.zenzan.jp/cgi-bin/zenzan/siteup.cgi?category=3&pa...
「STEP 5:サヤ詰め：施釉されたお皿は、自動サヤ詰め機にて、サヤという専用の入れ物に詰められます。」

Really, it depends on the context.

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Note added at 2 hrs (2011-02-05 16:10:43 GMT)
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http://www.patentjp.com/08/V/V100001/DA11347.html

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Note added at 2 hrs (2011-02-05 16:14:45 GMT)
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Okay, so they (1) make the tiles in tile molds, (2) put the molded/pressed tiles in the saggars, and (3) fire them. Makes a lot of sense. This reference is the clearest I could find:
http://www.tilenet.co.jp/seizou_koutei/

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Note added at 17 hrs (2011-02-06 07:24:33 GMT)
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You're welcome! It was fun.