Delta ST - Star-sealed T-shirt bags

The Delta ST enables production of star-sealed T-shirt bags on roll in 1 or 2 lanes. It is also possible to produce conventional

T-shirt bags, wave-top bags, side sealed, bottom sealed and star-sealed bags in a Delta ST line. It is available for production in-line with an extruder or out-of-line, from an unwinder.

The configuration is identical to the Delta T, for production of conventional T-shirt bags, with addition of the “star-sealed kit”. The “star-sealed kit” is a patented concept that allows production of star-sealed and conventional T-shirt bags in the same line. The configuration includes a Delta sealing module, a punching module for cutting out the handles of the T-shirt bag and an extraction module for removal of the cut-out waste. The cutting plates in the punching module are fixed to a magnetic roller and can be changed to another cutting pattern within a few seconds.

A patented concept makes it possible for the shaped cut-out to be done before perforation and sealing. This ensures that cutting is done in a zone with precise tension control, giving a clean cut and accurate positioning of the cut-out, minimizing skirt variation. All bag types can be wound conventionally or interleaved. It is possible to integrate automatic roll handling/packaging to your Delta line.

  • Max. speed 160 m/min (530 ft/min)
  • Max.cycles/min 300 (600 bags)
  • Max. sealing width 1100 mm (43.3 in)
  • Min. bag length 500 mm (19.6 in)
  • Max. bag length 10 m
  • Film thickness from 5 micron


End Products
Types of bags for this solution
Star-sealed T-shirt (side view)
Star-sealed T-shirt (bottom)
Bottom sealed, layflat
Technical data
Delta 900 STDelta 1100 STDelta max 900 STDelta max 1100 ST
Min. film thickness5 microns5 microns5 microns5 microns
Max. speed160 m/min160 m/min160 m/min160 m/min
(530 ft/min)(530 ft/min)(530 ft/min)(530 ft/min)
Max. cycles/min300 (600 bags)300 (600 bags)275 (550 bags)275 (550 bags)
Min. bag length500 mm (19,6 in)500 mm (19,6 in)650 mm (25,5 in)650 mm (25,5 in)
Max. bag length10.000 mm (393,7 in)10.000 mm (393,7 in)10.000 mm (393,7 in)10.000 mm (393,7 in)
Max. sealing width 1 lane900 mm (35,4 in)1100 mm (43,3 in)900 mm (35,4 in)1100 mm (43,3 in)
Max. sealing width 2 lanes2 x 440 mm (17,3 in)2 x 540 mm (21,2 in)2 x 440 mm (17,3 in)2 x 540 mm (21,2 in)
Technical drawing

Product sheet

Download here

See the product video about Delta ST Star-sealed T-shirt

Find your contact


Roll-o-Matic A/S

Damsbovej 12

DK-5492 Vissenbjerg


+ 45 6611 1618


Roll-o-Matic Inc.

1300 Minters Chapel Road

Suite 100 Grapevine

TX 76051 - USA

1 (435) 237 7408