a modular apparatus is provided for the purpose of packaging an article in a special wrap . the modular apparatus has a receiving portion , arranged to receive a partially - wrapped article into a predetermined location , from another machine , and a special - wrap assembly that forms the desired special wrap . for a double twist - wrap , the special - wrap assembly has rotatable twist grippers that grip the ends of the tube - wrapped article , and twist the ends to form a twist - wrapped article , and includes a twist - wrap drum and geneva wheels that drive the twist grippers . the modular apparatus is used with a flow - wrap packaging line for wrapping a series of individual articles , which has a first section , in which a film is formed into a tubular wrap about the articles , and a cut - and - seal section , in which the tubular wrap is cut between each two successive articles . the modular apparatus may be detachable from the flow - wrap line but in any event is capable of being deactivated to permit use of the flow - wrap packaging line without the special wrap .