This is the first article in a series of blog articles intended to educate users new to flow wrapping as well as to help experienced users looking for a quick reference.   It covers the basic operational principles of horizontal flow wrapping. These principles are the same for every horizontal flow wrapper, often referred to as horizontal form fill and seal (HFFS) machines.

Every wrapper has an infeed conveyor, a film feed assembly (backstand), a film forming area (former), bottom seal (finseal), a cutting head and a discharge area. Food and non-food products created by processing equipment, are placed on the infeed conveyor of the flow wrapper. This can be done by hand feeding or by using an automated feeding solution. As the infeed conveyor delivers product to the forming area, film is drawn from the film feed assembly into the forming area, where a film tube is formed around the product and a finseal is created. The film tube and the product are then delivered to the cutting head. The cutting head creates the end seals while it cuts apart adjoining wrapped products into individual packages, and delivers the packages to the discharge area. From the discharge area, the packages can be either cartoned at a packing station or accumulated for packing at a later time.

Flow Wrapper Principle


More details on the basic principles of horizontal flow wrapping can be found in Bosch’s Guide to Flow Wrapping.  Download your copy today under the “Links and Downloads” section on the Pack 101 flow wrapper webpage on the Bosch Packaging website. This guide contains other sections to assist users in initially setting up their wrapper, film selection, changing over to new products, or solving problems common in flow wrapper operation.


The history of candy dates back to ancient times.  As candy production evolved, Bosch became an expert in manufacturing candy processing machines.  In the 1960s, hard candy production grew to be a Bosch specialty.  With many key variables in hard candy production, the forming die is fundamental.  Bosch’s forming die heads are smooth-running, low-wear, high-speed dies.  Our forming dies are very versatile and are compatible with all types of hard candy production equipment.

Bosch Packaging Services offers candy-die consulting services to ensure optimal die selection for your candy mass.  For new candy formats, send in your sample and we can supply you with a 3D graphic design and prototype.  We offer many solutions available in virtually all shapes, sizes and consistencies as well as fill or no-fill options.

Take a look at the Confectionery Forming Dies for Hard Candy Production brochure attached.

For questions or inquiries, contact us.

Following Errors are one of the most commonly reported errors. Several weeks ago, we published a blog post pertaining specifically to Troubleshooting Following Errors on Stratus Wrappers. While this topic was very well received and helpful for those of you with Stratus wrappers, what about those of you with Linium wrappers? This week, we will provide a few simple steps to Linium (PC-104) Open Loop Diagnostics.

As discussed previously, a Following Error is generated by the machine motion controller triggering incorrect feedback from the motor to the computer.

The Open Loop diagnostic allows maintenance personnel to select a motor, enter a voltage (velocity) and run the motor (enable). Once the desired motor is selected, the velocity is set, and the enable is set to yes, pull out the emergency stop button. Press and hold in the start button. The selected motor will run in an open loop mode as long as the start button is held in.

Access the “Diagnostic Open Loop” screen to display information helpful to diagnose motors and encoders.

Note: The Emergency Stop button must be pressed in before entering this diagnostic for the function to work.

Linium Open Loop Diagnostic Image

The diagnostic screen displays the following information:

Motor: Turn the Press-To-Accept knob to select the desired servo motor drive (infeed, finwheels, or cutting head; power feed roll and discharge motors are not servo motors and cannot be tested with this diagnostic).

Velocity: Indicates the desired analog voltage being sent to the motor drive. Turn the Press-To-Accept knob to change the analog voltage.

Enable: To start the diagnostic, rotate the Press-To-Accept knob to display “Yes”. This will enable the drive.

Encoder: Indicates the encoder position of the selected motor. When the motor is rotating in the correct direction, this value should be incrementing.

Direction: Indicates the status and direction the motor is rotating. When the motor is rotating, it should display “Forward”.

And just like that, you’re back in business! Continue to watch for future posts pertaining Following Error troubleshooting as well as other tech tops for Bosch Wrappers. If you are interested in tech tips not specific to Following Errors, inquire and we will publish a blog that can be helpful for everyone!

As always, contact our technical experts for further assistance with your Bosch Packaging Equipment.

SpringAs we transition from the long, cold winter months and enter into the first warm days of the year, spring cleaning is inevitable.  With spring cleaning comes the opportunity to perform maintenance, spare parts overhauls, machine audits, changeovers and upgrades on your Bosch Packaging equipment.  With field service and spare parts delivery schedules filling up fast, we recommend that you place your orders in advance.

Spare Parts: Safe, reliable and worth every penny.
Included in our spare parts portfolio are Preventive Maintenance Kits, Repairs (Electrical and Sharpening Services) and Stock Optimization.

Field Service: Whenever and wherever you need us.
With Bosch Field Service our expert technicians and engineers are available to perform Machine Audits, General Service/Production Support, Preventive Maintenance Agreements and Training.

Modernizations: You define the target, we find the best solution.
Our Modernizations team is constantly evolving and expanding its solutions whether it’s Controls or Mechanical Upgrades, Remanufactured/Rebuilt Equipment, Change Parts and Line Integration support.

Contact us today to place an order for spare parts, schedule a service tech or inquire about your next equipment overhaul or upgrade.

Telephone: +1 919 877 0886
Fax: +1 919 877 0887

Coffee AromaAmericans love their cup of coffee. Therefore, it is not surprising that the U.S. is one of the biggest coffee markets in the world, consuming about 2.9 billion pounds of coffee a year*. While coffee houses are very popular in the States, home-brewed coffee is on the rise, following a trend of greener and cheaper coffee consumption. But no matter where you enjoy your cup, consumers demand a wide variety of coffee tastes, leaving coffee producers with new challenges for their business.

To meet changing consumer demands, coffee producers need to adapt their production in order to make it more flexible. With over 50 years of experience in coffee packaging, Bosch Packaging Technology offers dedicated solutions for the coffee industry. Knowing how important it is to save the coffee’s unique aroma and its premium quality, our main focus lies on product protection as well as efficient packaging technology.

Find out more about our portfolio and visit us at the Specialty Coffee Association of America’s Expo  (SCAA 2014) in Seattle, from 25th to 27th of April 2014. We are looking forward to welcoming you at our booth # 1011.

*Source: ICO,

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