GBK 420

GBK 420 packaging machine

Sl 50 + GBK 420

Combination of the Selectra slicing machine and the GBK 420 automatic packaging machine.

GBK 420 - Schieberarm

Slide arms: Product slider with vacuum system. Sucks the excess air out of the bag before closure.

GBK 420 - Spreizbleche

Always at hand: the spreader plates are stored on the inside of the door.

GBK 420 - Auslaufband

Intermittent discharge conveyor for gentle and rapid removal of the sealed packages.

GBK 420 - ABM

Automatic "ABM" bag magazine: bag replenishment can be carried out while the machine is running.

GBK 420 - Jetfilter

Self-cleaning vacuum filter, "Jet Filter": the filter inserts are cleaned via cyclic bursts of compressed air.

GBK 420 - HPD

Optional: "HPD" foil printer for printing on plastic clip tape.


Double receptacle roller for closure tape.

GBK 420
Sl 50 + GBK 420
GBK 420 - Schieberarm
GBK 420 - Spreizbleche
GBK 420 - Auslaufband
GBK 420 - ABM
GBK 420 - Jetfilter
GBK 420 - HPD
Standard specification

Welded machine frame, lacquered in stainless steel design colour, standard
Footrests without dowel holes
Panels, doors and electrical cabinet or switchbox made from stainless steel
Hasp locking for cover panels
Protection hoods made of polycarbonate
Conveyor system with adjustable speed
Transfer line with pusher dogs, base plate made from plain stainless steel
Lateral guides, plain stainless steel
Lateral guides above transfer line, manually adjustable by handwheel
Bag aspiration through product pusher head
Integrated self-cleaning vacuum filter (Jet-filter) with side channel blower device
Product pusher and bag air aspiration
Single bag lifting device
Sensor `bag spanned open for filling at spreader plates`
1st set of spreading plates for bag opening
2nd set of spreading plates for bag opening
Automatic bag magazine for extra-fast stack changeover `ABM-70 Twin S ` for straight U-shaped brackets and cropped U-shaped brackets
Automatic infeed and positioning of the next batch of bags
Automatic controlled switch-off at empty bag magazine
Illumination of the working area inside the machine
Closing aggregate for clip
Detection for bag ruffles with clip closure or closure such as Kwik-Lok®, Schutte Clipps® etc. (not in connection with quality seals)
Double spool for closure rolls
Powered Discharge Conveyor
Product outfeed with lateral guides, manually adjustable
Sterile filter for sterilization the compressed air coming into contact with the products
Signal lamp - red / green
Signal horn
Switch cabinet with hasp locking
Switch cabinet with fan+filter system - standard-
Comfort-operating panel, rotatable with support arm system
Controls + touchpanel Omron
Frequency converter Hitachi
Electric execution according to CE-specification
Operating language and labels in German language
Operating manual in German language
Spare parts catalogue in German language

Welded machine frame, stainless steel, standard (crank-rockers made of galvanised steel)
Protection hoods made of perforated stainless steel panels
Crosswise infeed for Bagels , Muffins
Crosswise infeed, 1 infeed paddle for upright slices
Crosswise infeed, 2 infeed paddles for upright slices, for half bread loaves
Extension (915 mm) for inline infeed. Additional space for manually infeed
Transfer line made from a roller carpet with changeable carrier plates (max. 55 bags/ min)
Side guides, smooth VA with blowing nozzles for product stabilization
Extended bag magazine for 5 bundles
Tamper proof sealing - Perforating and sealing the frill of the closed plastic bag with a heated comb - 1 line (max. 55 bags/min; only in combination with clip-closure or Kwik-Lok ® closure)
HPD-Printing on the clip, 6-digit
HPD-Printing on the clip, 9-digit
HPD-Printing on the clip, 13-digit
Preparation for retrofitting an HPD printer (without printer, printer assembly or commissioning)
Kwik-Lok® aggregate for Kwik-Lok® type J-NRP
HPD-Printing on Kwik-Lok®, 6-digit
Product control on discharge conveyor and press jaw, adjustable by hand wheel
In line discharge: Accelerator belt, length 750 mm, foldaway, fixed at machine door
Switch cabinet with service interface FrontCom® with LAN and power socket
Additional signal lamp
Switch cabinet with air-conditioning
RFID - Panel access authorization per chip, 10 pieces with up to 5 authorization levels
RFID - Additional chip, 10 pcs. with up to 5 authorization levels
Frequency converter Allen Bradley
Remote service, VPN-Switch INSYS, (Master unit)
Voltage modulation, 3-phase
Electric execution according to UL-specification
Customer-specific special machine modifications
Customer-specific operating language and labels
Customer-specific operation manually
GBK 420
GBK420 + SL50
GBK 420
GBK420 + SL50

Can the machine be cleaned wet?

The machines are designed according to protection class IP54. Wet cleaning of the machines inside the cutting and packaging room is not recommended as moisture and bread crumbs directly cause the formation of mold spores.

Wet cleaning should therefore only take place outside the cutting and packaging room: components of the machine, such as guide plates, can be dismantled and cleaned at an external washing area. After drying and disinfection, the hygienically flawless dry components can be inserted into the device and reused.

Change kits allow cleaning and preparation in addition to the production operation.

What is the difference between packaging and sealing?

Packaging means: positioning products automatically in a bag, extracting residual air from the bag, closing the bag close to the product inside the packaging machine.

Closing means: The products are either introduced externally into the bag or manually inserted into the bag on the device.
Some devices suck the residual air out of the bag, after which the bag automatically closes inside the device.

What is the difference between a type GBK and type VS ?

In the case of the GBK type, standing bread slices are packed, while the VS type packs lying stapled slices. Both systems are able to package other types of products and products grouped differently.

GBK type

- Upright standing bread slices
- Whole breads
- Grouped products - fast food

VS type

- lying stapled bread slices
- Stacked flat breads (tortilla, arabic bread, pitta)
- Grouped products

Are brochures in other languages available?

Further brochures in other languages ​​are available here. The technical state may not be updated!

How can I determine the size of bags?

Bag sizes depend on the products and the orientation of the products in the bag.

In any case, the product tolerances must be considered. This is especially important when several products are packed side by side, one after the other or one above the other in a single package. A beautiful packaging fits as closely as possible to the product and supports the product. The sizes recommended by GHD Hartmann can be looked up in an Excel spreadsheet.

How loud is a machine by GHD Hartmann?

The noise emission initially depends on the type of machine. Packaging machines, cutters or systems for grouping are fundamentally different due to the different functions.

Another factor is the nature of the products, which can behave differently during processing and transportation. A machine may be very quiet at idle, but produces varying amounts of noise during processing, depending on the products.

The type of cover also has a great influence on the noise emission: Polycarbonate viewing covers significantly reduce the noise level, while perforated grids can not significantly reduce noise emissions.

As a rule, the maximum noise emission of the machines is not more than 78 dB (A).

What is a quality seal?

By "quality closure" is meant the single or double row perforation sealing of the bag ruffle. The bag can not be opened without breaking the seal.

Customers can thus control possible manipulations of the packaging or the products on the shop shelf.

The quality seal is not a hermetic seal.



Which controls can GHD Hartmann Maschinenbau offer?

In addition to contactor controls for simple devices, GHD Hartmann Maschinenbau offers systems from the manufacturer Omron as a standard controller for more complex tasks.

Siemens or Allen Bradley are available as options.

What compressed air quality is recommended for machine use in the food industry?

According to ISO 8573-1 with reference to VDMA standard sheet 15390-2, we specify a compressed air quality that we recommend when using the machines and devices.

Which bag closures can GHD Hartmann offer?

Hartmann closing devices and Hartmann packaging machines have an integrated aggregate for the closure application. Depending on the machine type and series, the closing system can be supplied for the application of a certain type of bag closure. Later conversions are partly possible.

Clip closure: The closure used very often in Europe. Cost effective with the possibility of printing on the closure. Good to use for PE bags, PP bags and paper bags.

Clip Closure Hartmann Bag packaging


Kwik-Lok ®; Schutte Clipps ® G or corresponding closures: Widespread in North America and Asia. No metal components in the closure, but difficult to detect or undetectable. Unsuitable for paper bags. A printing of the closure is possible.

Kwik-Lok Schutte Clipps G


Tape - Closure: In the United Kingdom, in English-speaking countries and occasionally in Africa, the tape closure is applied. Hartmann offers this type of closure in packaging machines and specially designed sealing devices. A printing of the tape closure is possible.

Tape closure Hartmann


Sealing: The sealing of bags with a sealing system is available for various types of machines. For closing, the filled bags can be sealed, or the frill can be sealed in addition to the conventional closure. The packaging material and its welding properties must be observed.

In the case of pillow packs, the packaging film is sealed on the longitudinal and transverse side and, optionally, as a division in the longitudinal direction. Depending on the machine type, the protruding film is cut off during sealing.

bag_sealing rouche_frill_sealing Hartmann


Tamper proof / Quality closure: In addition to the clip closure or Kwik-Lok ® / Schutte Clipps ® G closure, a tamper proof application system can optionally be installed within the GHD Hartmann machine. This lock is either one or two rows and can be activated. It increases security against manipulation from outside during sales.

tamper proof qualitysealing Hartmann


Twist - Closure: This closure is known in South America and in English-speaking countries. GHD Hartmann cannot offer integration within the packaging machines. This closure is attached with a separate device provided by the customer after the products have been packed in the bag. For technical reasons, it is not possible to remove air from the bags when they are closed.

Twister Drahtverschluß


Does GHD Hartmann supply its own printer devices?

GHD Hartmann supplies HPD printers with a choice of between 6 and a maximum of 13 positions for printing clip tape. A 6-digit HPD printer can be offered for closures such as Kwik-Lok® or Schutte Clipps®.




GHD hartmann HPD-Drucker

Hamburger Brötchen
Toastbrot verpackt

GBK 420

The sophisticated technology of the GBK 420 machine guarantees optimum packaging and closing. Two alternately operating product sliders ensure optimum capacity utilisation, which is what makes this packaging machine so high performance. The versatile application possibilities make it possible to reliably meet the current market requirements and trends in the packaging sector and without problems. By consistently separating the product work area from the mechanical drive, this generation of machines also meets cleanroom requirements.

Technical specifications

Dimensions: Length: approx. 5000 mm, Width: ca. 1950 mm, Working height: 1000 mm, Height: approx. 1550 mm
Weight: 2100 kg
Product dimensions: Length: 100 - 400 mm, Width: up to 260 mm (depending on products), Height: 30 - 170 mm (other dimensions on request)
Capacity: 1800 - 4200 packages /h
Speed: adjustable
Controller: Omron
Operating panel: Touchscreen
Control voltage: 24 V, DC
Frequency controller: Hitachi
Pneumatic system: Festo
Power supply: 230/400 Volts / 50 cycles
Power consuption: 5 kW
Compressed air: min. 6,0 bar (ISO 8573-1)
Packing material: pre-manufactured plastic bags, or paper bags (paper with clip closure only)
Operating side: left / right
Protection class: IP 54
Adjustment: manual