Defective can seam was the major reason to cause the canned food products being contaminated with microorganisms and the contaminants from the surrounding environment. Clostridium botulinum (C. botulinum) was the spore forming bacterial which can be commonly found in those contaminated or leakage canned products. They can multiply rapidly within the canned food as those food serve as the nutrients for them to grow. Botulism was the most common food born disease in the canned food industries. The botulinal toxin produced by C. botulinum can cause a person death if have consumed it. Thus, the routine inspection of double seam in canned food industries was important and needed to be carried out so that those kinds of can defect can be eliminated
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Based on the results shown in Table 1 for the leaking test, no bubbles have been observed for the tight seam can and least bubbles was observed for the loose seam can whereas the normal seam can has shown moderately bubbles if compared to both tight and loose seam can. The bubbles observed have indicated that there was a leakage for both loose and normal seam can. In theoretically, there should no bubbles being observed for the normal seam can as it can form a hermetic seal. This might due to the technical error during the double seaming process as the process was handled by an untrained student instead of the well-trained and professional laboratory assistant. When the double seaming was still in progress, the can has been released and leave from the seam …show more content…
The shortness of the body hook of loose seam can was mainly caused by the low base-plate pressure being applied during the first operation to pre-shape the seam (Birkeland, Bergslien, Strand, & Sivertsvik, 2005). On the other hand, the greatest body hook of tight seam can might due to excessive base-plate pressure was applied thus causing a long body hook. The cover hook of normal seam can (1.92±0.03mm) was the greatest and followed by tight seam can (1.81±0.06mm) and loose seam can (1.67±0.05mm). The highest cover hook of normal seam can might due to the technical error during measuring as the measurements were measured by different people thus resulting in the reading obtained might not so accurate. The loose seam can have the smallest cover hook might due to the first operation fail to curl the cover end thus resulted in it was not in contact or under the flange of the can
Based on the results shown in Table 1 for the leaking test, no bubbles have been observed for the tight seam can and least bubbles was observed for the loose seam can whereas the normal seam can has shown moderately bubbles if compared to both tight and loose seam can. The bubbles observed have indicated that there was a leakage for both loose and normal seam can. In theoretically, there should no bubbles being observed for the normal seam can as it can form a hermetic seal. This might due to the technical error during the double seaming process as the process was handled by an untrained student instead of the well-trained and professional laboratory assistant. When the double seaming was still in progress, the can has been released and leave from the seam …show more content…
The shortness of the body hook of loose seam can was mainly caused by the low base-plate pressure being applied during the first operation to pre-shape the seam (Birkeland, Bergslien, Strand, & Sivertsvik, 2005). On the other hand, the greatest body hook of tight seam can might due to excessive base-plate pressure was applied thus causing a long body hook. The cover hook of normal seam can (1.92±0.03mm) was the greatest and followed by tight seam can (1.81±0.06mm) and loose seam can (1.67±0.05mm). The highest cover hook of normal seam can might due to the technical error during measuring as the measurements were measured by different people thus resulting in the reading obtained might not so accurate. The loose seam can have the smallest cover hook might due to the first operation fail to curl the cover end thus resulted in it was not in contact or under the flange of the can