Many operations try to simplify their packaging process by standardising on a small number of box sizes. The logic is sound: fewer formats means easier stock management, simpler case erection, and a case sealer that can be set up once and left alone. For operations with genuinely consistent product ranges, it works well.
But for print-on-demand businesses, online retailers with broad product ranges, food and drink distributors handling multiple SKU sizes, or any operation where the order drives the box choice rather than the other way around, format standardisation is a compromise that costs money. Over-boxing a product wastes cardboard, increases dimensional weight charges from carriers, and requires more dunnage to prevent movement. Under-boxing risks product damage. The right box for the product is simply better — operationally and commercially.
The Problem: Variable Formats Need a Different Sealing Approach
If you run variable box sizes, your sealing stage needs to handle them. The options without a random sealer are limited and expensive: manually adjusting a fixed-format sealer every time the format changes (slow, error-prone), stationing a person to tape boxes by hand (labour-intensive, inconsistent), or restricting your operation to fewer box sizes than the product range actually requires.
Each of these options carries a cost — in time, in labour, in tape consumption, or in the quality of the finished seal. A random case sealer eliminates all of them.
The SIAT SR20: Self-Adjusting Random Case Sealing at Mid Volume
The SIAT SR20 Random Case Sealing Machine (£5,874 excl. VAT) is designed for operations handling variable box sizes at mid-volume throughput. The SR20 automatically adjusts to the height and width of each incoming case, applying top and bottom tape simultaneously without any manual intervention or line stop.
Cases of different formats can be processed in sequence — the machine reads each box as it enters and sets itself accordingly. The operator loads boxes onto the infeed; the SR20 handles the rest. The result is consistent, correctly applied tape on every case, regardless of format, at the speed your line demands.
The SIAT SM44HD: High-Volume Random Sealing for Demanding Lines
For operations with higher throughput requirements typically 20 or more cases per minute the SIAT SM44HD Fully Automatic Case Sealing Machine provides the same random self-adjusting capability at a higher performance specification. The SM44HD is designed for continuous, high-volume operation, handling mixed format lines at production speeds that smaller random sealers cannot match.
Both machines apply tape with consistent tension and overlap, removing the inconsistency of manual sealing and the delays of manual machine adjustment. The difference is throughput capacity: the SR20 for mid-volume lines, the SM44HD for high-volume production environments.
Calculating the Business Case
The business case for a random case sealer typically rests on three things: the labour cost currently dedicated to manual sealing or machine adjustment, the tape waste and quality issues associated with inconsistent manual application, and the commercial benefit of being able to right-size packaging to the product rather than the machine. For most operations processing more than 100 variable-format cases per day, all three of these factors add up to a meaningful case for investment.
View the SIAT SR20 and SM44HD at pakprint.co.uk or call Pakprint on 01924 483000 to discuss which random sealer specification matches your box range and throughput requirements.
