Sealing margin

For a square cell of dimension, X, with a sealing margin of constant width, z, the... 

Not only does the larger cell have a smaller ratio of seal perimeter to active area, but also the active area fraction of total area is greater as the cell size increases while fixing the seal margin width. 

The above equations were used to compute the seal leak rate through all four sides of a 10 x 10 cm cell having a 1-cm seal margin and a seal height of 50 jitm (0.002"). An average seal differential pressure of 750 Pa (3" HzO column) was assumed. The computed unsealed, or open gap, leak rate was 1.8 standard cm3/min per cell unit... 

Elimination or avoidance of capillary channels in seal margins (possibly due to creases in seal area). 

If made from a reel process (which is usual), how resulting pack is removed from web by guillotining or punching. Hence accuracy and tolerance of cut are important so that an adequate heat seal margin is maintained. 

The value of a damped response is that the areas under seals or other close clearance areas can be investigated on a dynamic basis. This can be done at any selected station on the rotor. If there is encroachment on clearance, the rotor can be tuned to avoid the problem areas. The reliability of the machine can be considered rather than arguing the need for large margins to avoid the unknown. 

Kremer proposes sealed-envelope tenders in which the successful bidder is the one offering the second highest price, as this mechanism would best show the bidders preferences. A great number of key details come into play in order for the mechanism to work correcdy, all of which are clearly set out in the article. Issues such as the relationship between substitutes and complements with a patent in private hands, the interrelation with existing patent holders, the size of the margin to pay above the private value, and how to avoid collusion, are also dealt with in the article. 

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