January '13

For the Business of Apparel Decorating

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Roland_Stellas_2-3_PW.pdf 1 12/4/12 9:28 PM and those that don���t, there are some considerations that will help in choosing the right press for your application. Machine construction By far, the three most common types of machine construction are: opposing plate, clamshell and swing-away. Opposing plate construction is easy to spot. It is a single heated platen arranged in parallel over a lower platen. Typically, the lower platen slides under the heated plate. Although, in the case of a specialty machine or label press, the lower platen can be a mandrel or pedestal���single or multiple air cylinders that literally ram the heated plate into the lower platen develop the pressure. This type of machine can develop a considerable amount of pressure. Label presses and very large flatbed sublimation application machines employ this technology. The clamshell (named for its resemblance to the bivalve mollusks we gorge ourselves on at the beach) splits and opens with the heated upper platen moving away from the lower��� just like a clamshell. The pressure is developed by a toggle arrangement and is governed by the mechanical advantage developed by the height of the back tower. When evaluating a clamshell press, consider the distance between the lower platen and the upper heated platen when the machine is in the open position, as well as the distance between the lower platen and the heated upper platen at the back of the machine. The mouth and throat openings indicate how much working room the operator will have below the press. Normally, the opening is adequate for the application of most sheet transfers to the average garment. However, if you are going to arrange and align die-cut numbers or heat-applied flex materials, you may want to consider a machine with a head that moves away from the lower platen working space. Swing-away presses are characterized by an upper heated platen that literally swings C M Y CM MY CY CMY K Use Info # 188 2013 January Printwear PW_JAN13.indd 37 | 37 12/14/12 12:17 PM

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